For me, the two games I hate most that I always feel like ragging on are Final Fantasy XII and Final Fantasy X-2. Both games are guilty of the same sin - wasting my Goddamn Mother Fuckin Time while I could have done something more productive, like have sex!! Over 100 hours in both of those games, and I'm still missing tons of shit, plus in FFXII, the best items are from random steals and chests. Moreover, some items are unobtainable after a certain point (fuckin Zodiac Spear!).
There are plenty of games out their, like Halo for example. I played through the game a couple times, even beat the original on Legendary mode. Overall it was a decent experience, it's not my favorite game, but I don't hate generic FPS games like Halo 3, Singularity or Haze that much because they've never done anything physical to hurt me.
Final Fantasy XII and X-2 on the other hand have wasted so much of my time, and I got 0% satisfaction in return for all my time spent! Sure, part of it is my fault for not stopping, sure, but I also blame my pride and unwillingness to give up until I saw everything in those games. I've seriously prayed to god like - "God, please give me back all those hours I wasted on FFXII, I fucking hate that game so much!"
That's how much I hate those games.