Proteus214 said:
Any of the bosses in Prototype. I thought that they were just poorly designed.
I can help you with that, if you like >_>
OT: really HATE? I would go so far as to say the Juggernaughts in Modern Warfare 2. Man to man, they beat you every time. Not really bosses though.
Then of course, there's the Tank from L4D. Nothing makes me cringe or rage harder than facing a Tank with idiots on your team. I mean, Tank spawns before the music starts, and you must either pass a 'trigger' or enter his cone of vision to set him off. You blatantly hear him going "Raaaargh!" and grunting from ages away, and fools run off ahead as if deaf. Protip: Throw a molotov and get some distance..