How the hell do i increase my resistance to death/mortal/decapitation/oneshooting hits? I'm a one-handed heavy armor lv45 and the bandits marauders, or either almost any [censored] bandit at my level can critical strike me or decapitate me when my hp is at 60% WTF?

The game is just horrible at this point, i can't stop driking potions, and when i block the attack of a [censored] bandit marauder or mercenary it seems that they do 999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999 damage.... and actually im wearing epic leggendary gears wtf...

Intsa-death is tied to your remaining health i think, so increase your health to avoid it.

Just out of curiosity, what level are you playing on?

I'm the best dumpass ever lol! i just realized that iìve been fighting ovepowered enemies on leggendary difficulty wtf xD that's why they decapitate me so fast wtf x.x i'm so sorry! thought i have set it back to adept x,x

Playing on the right difficulty setting helps but as above, to avoid it, have plenty of health as it calculates how much health you have left if it will be a death blow cam kill. Or if on PC, you can get mods that disable the death cam on yourself.