Actually more points in stamina will help, plus I think there is an extra talent that reduces the chance of stun, pain and the like. And of course there are potions that render you immune, can't remember which though.
I was more annoyed at the "cool" finishing moves, which were only cool the first 2-3 times, later they just seemed to hold you up in the excessive slaughter. That's a problem with The Witcher per se, it often tries to be too cool, less would be sometimes more.