A lot of people seem to forget this right now. I think part of it too though is people aren't just mad that we can't continue playing after the ending, but we are "dying". They're mad that they didn't get the fairytale ending that they wanted, not saying they shouldn't be mad, but I feel like they aren't understanding that that's the point of the whole story.
The whole story is about how we aren't the saviour of the world, we're just another guy and we aren't in control of anything, things go terribly wrong for us all the time in this game. Why did we think everything was gonna work out for us when everyone and everything throughout the whole game was trying to convince us it wasn't gonna go as planned? Why are people mad that V is supposedly dying? People die everyday, so many characters around us in the game died unexpectedly and there's nothing you can do to change that. That's how life is in real life and especially in a dark-dystopian world like Cyberpunk.
But even in saying that, there's still hope at the end. Whether you go with Panam or sell your soul or Work for Blue Eyes, there's still hope that we can find a cure or find a way to live again. (If you go with Panam, Misty basically confirms that you're doing alright afterall).