I have two
The first is Turok: Rage Wars, because of the crippling bug that didn't let you advance past the third stage in two-player mode. I would have put Duke Nukem Forever here, but that's an obvious choice and I felt like being unique. But yes, DK:F was horrid, indeed!
My second choice is Counter-Strike: GO. Not because the game is bad, it looks decent. That's the problem! Every time I try and play a game, my "team" votes me off. Immediately. I get to look, but not touch, so to speak. I have played a total of 15 minutes in the 4 months I've owned it on PS3. I bought it because I wanted a new take on competetive FPS multiplayer, but I guess I'll never get a chance. I thought the CoD crowd was aggravating, at least they don't (or can't) kick you off a match.