@Shivansps First of all, I am not saying Syanna didn't go through a lot, nor that she deserves to be killed or even punished. I agree with a lot of the points you make. However, that does not and cannot justify her actions. Sure, she might feel it is a valid excuse, but it actually isn't.
What she went through at a young age is certainly not exceptional. Plenty of characters went through worse. Think of Geralt and witchers in general. They are bitter, of course, they are angry at and bemoan the fate that was brought upon them, but they're not usually searching for their parents who abandoned them to kill them. Also, Ciri is more than a valid comparison. She has faced much, much worse circumstances than Syanna and at a younger age, all alone. And she was doing rather despicable things later on. I am talking about her backstory from the books here, just to be clear. And she was given a chance to atone herself in the end just like Syanna was (in a sense) - so why couldn't Dettlaff?
Whether Syanna was using Dettlaff from the start or it was 'something real' in the beginning, we cannot tell, but it would be even worse if she actually cared for him and maybe even loved him and then decided to dupe him like that because of her twisted sense of revenge.
Here is the thing, you cannot talk to Dettlaff and talk sense into him because the game does not allow you to, not necessarily because he is only an impulsive and senseless 'adolescent' otherwise. It started great, it ended poorly. This is where I think the writers should have expanded his story.
I am not talking about this particular situation alone. I am talking about his whole life, which is, we can only speculate, probably at least 15 times longer that Syanna's. Dettlaff, just like Regis, knows very well what it feels like to be isolated not only from humans and be perceived as a monster, but also from his fellow vampires because he didn't share their sense of fun in drinking blood, etc, etc. as Regis clearly states in the game. He is in a worse situation than Syanna in my opinion. That's why he has found a safe haven in her when she showed him trust and possibly love and that's why it is understandable that his world would crush when the foundations upon which he possibly wanted to build a new life have proved to be a farce. Dettlaff is not some silly spoiled brat, he is a tragic character here. Of course he would be out of his mind.
Here is the thing, Dettlaff does not perceive death as people do. Innocents are dying is not a valid way with which we can evaluate his character. That's one of the important themes in the Witcher world - which reasoning, which point of view is justified and why. Geralt faces it constantly when dealing with sentient monsters that may have their own reasons and explanations, however far-fetched they may seem to 'ordinary folk'. Why did he leave Orianna when he saw her drinking that kid's blood? The reason Dettlaff sends vampires on the city may be interpreted as this - OK, Syanna, you wanted me to kill a few people here... no, now I will raze the whole city. It is simply vengeance. Rush and impulsive - yes. But he has no intention of killing innocent people just because he is a monster, other things are involved here.
And so on, and so on...
The point is - I am saying that 'defending' Dettlaff and his actions is not in any way invalid and understanding his character is overall beneficial to the story. It should not disturb anyone in the least. In my opinion, Dettlaff should have gotten more screen time and interaction so that the player can feel the polarity and the struggle of all sides. This way it feels too uninspired. He is not just running around throwing bats at people's faces. His character should have been more developed so that the impact of the decisions could leave a stronger impression on the player. And I would personally like another form of ending where you can help Dettlaff and the sisters. I don't see him as a senseless idiot, not at all. Moreover, that sort of ending would have helped Regis as well. If you kill Dettlaff, Regis is pretty much screwed. Maybe it could have been much more difficult to reach, but it should have been there. And such an ending would be in harmony with the idyllic ending at Corvo Bianco CDPR strived to achieve.
What Syanna had to went trought at his age whould have screwed up anyone.....
What she went through at a young age is certainly not exceptional. Plenty of characters went through worse. Think of Geralt and witchers in general. They are bitter, of course, they are angry at and bemoan the fate that was brought upon them, but they're not usually searching for their parents who abandoned them to kill them. Also, Ciri is more than a valid comparison. She has faced much, much worse circumstances than Syanna and at a younger age, all alone. And she was doing rather despicable things later on. I am talking about her backstory from the books here, just to be clear. And she was given a chance to atone herself in the end just like Syanna was (in a sense) - so why couldn't Dettlaff?
Whether Syanna was using Dettlaff from the start or it was 'something real' in the beginning, we cannot tell, but it would be even worse if she actually cared for him and maybe even loved him and then decided to dupe him like that because of her twisted sense of revenge.
Here is the thing, you cannot talk to Dettlaff and talk sense into him because the game does not allow you to, not necessarily because he is only an impulsive and senseless 'adolescent' otherwise. It started great, it ended poorly. This is where I think the writers should have expanded his story.
He is not a child when all of this happen, first off it has emotional problems, and cant understand humans, thats already a problem.......
I am not talking about this particular situation alone. I am talking about his whole life, which is, we can only speculate, probably at least 15 times longer that Syanna's. Dettlaff, just like Regis, knows very well what it feels like to be isolated not only from humans and be perceived as a monster, but also from his fellow vampires because he didn't share their sense of fun in drinking blood, etc, etc. as Regis clearly states in the game. He is in a worse situation than Syanna in my opinion. That's why he has found a safe haven in her when she showed him trust and possibly love and that's why it is understandable that his world would crush when the foundations upon which he possibly wanted to build a new life have proved to be a farce. Dettlaff is not some silly spoiled brat, he is a tragic character here. Of course he would be out of his mind.
Here is the thing, Dettlaff does not perceive death as people do. Innocents are dying is not a valid way with which we can evaluate his character. That's one of the important themes in the Witcher world - which reasoning, which point of view is justified and why. Geralt faces it constantly when dealing with sentient monsters that may have their own reasons and explanations, however far-fetched they may seem to 'ordinary folk'. Why did he leave Orianna when he saw her drinking that kid's blood? The reason Dettlaff sends vampires on the city may be interpreted as this - OK, Syanna, you wanted me to kill a few people here... no, now I will raze the whole city. It is simply vengeance. Rush and impulsive - yes. But he has no intention of killing innocent people just because he is a monster, other things are involved here.
And so on, and so on...
The point is - I am saying that 'defending' Dettlaff and his actions is not in any way invalid and understanding his character is overall beneficial to the story. It should not disturb anyone in the least. In my opinion, Dettlaff should have gotten more screen time and interaction so that the player can feel the polarity and the struggle of all sides. This way it feels too uninspired. He is not just running around throwing bats at people's faces. His character should have been more developed so that the impact of the decisions could leave a stronger impression on the player. And I would personally like another form of ending where you can help Dettlaff and the sisters. I don't see him as a senseless idiot, not at all. Moreover, that sort of ending would have helped Regis as well. If you kill Dettlaff, Regis is pretty much screwed. Maybe it could have been much more difficult to reach, but it should have been there. And such an ending would be in harmony with the idyllic ending at Corvo Bianco CDPR strived to achieve.