If you are playing with the keyboard and mouse, i found the dodge key to be mapped to a really awkward key, by default, since you will be using this frequently and often.
Other players suggested that you can also dodge by double pressing the direction key, but i only learned that after changing the mapping to something i could easily reach and life as already better.
There's a few key rules..
- One you see a monster lunging at you thats it, you have to get out of the way or block it, or you're going to take damage. I dont know if you can block monster attacks (see once you learn how to dodge its so much fun you never want to not do it).
- There's a loading screen tip that comes up is very very true, for monsters, you want to dodge, for human opponents you want to block, and just at the right moment to stagger them. This is also extremely fun.. once you learn how to block humans you're basically untouchable unless another enemy hits you.
So the block and dodge keys are a core part of the combat sequence, you really can't play without them.
Oh wait, are you button mashing? This game doesn't support button mashing if you want to have any real fun with it, sorry. If you are, just try something different. As far as difficulty goes its kinda odd, because once you do understand dodge and parry the game becomes super super easy.. at least at normal difficulty levels. Yes, before you learn how to play this it can be definitely frustrating... i remember my first go at the wolves in the first scene and while i didn't die, i was a nervous wreck.. don't button mash.
EDIT: The signs, you use, just think magic.. are a little bit odd. They're so much fun, BUT!! You have to learn the name of the spell and what it does, and what key its bound to. There's no way around it. Unfortunately, 'force push' is called 'aard', and 'firewall' is called 'igni', etc.. you just have to learn these sadly. There's only 5 of them
EDIT2: There's also a targeting lock on function, when you first start and are not used to the animations and who geralt is naturally targeting this is a great feature. There are also a few fights in the game were you want to take out smaller enemies around a larger one first, and you don't want to chance swinging into the main boss and wasting the attack where this is useful.
EDIT3: Rolling is more of an 'oh crap button'. Don't worry about it until you get dodge and block, once you get those rolling tactfully will make complete sense.