There's been a lot of games that, despite how much you hate them, you just gotta complete anyway because everyone else has, or because people accuse you of "not giving it a chance".
Three such games stick out for me: Super Mario 64, Metal Gear Solid 3 and Final Fantasy 10 (the latter I slowly grew to love once I could get past Overdrive Sin).
With Super Mario 64, I always criticised the game for feeling "rushed" and "incomplete" (it's really hard to describe, but I know a few people who have seen eye to eye with me after I used that word then got them to go play it again) and having some utterly horrible cameras, which to this day I still believe is the only challenge in the game (and yes, I did get all 120 stars and meet Yoshi). Also, thanks mostly to this game, when a game has bad camera angles, I instantly stop playing and refuse to continue (Devil May Cry being the most notable): I've given "fake difficulty" a chance once already, I'm not doing it again. Banjo Kazooie came out some time later and I loved it. It was everything Mario 64 should have been, in that you could actually friggin' play it.
MGS3: This game made me laugh at so many times when I don't think it was appropriate to do so. The Boss in her Villain Costume (apparently it was a new sneaking suit or something, but I call it a Villain Costume, proper noun), The Fear's lame stating-the-obvious taunts, such as "HOW DEOZ IT FEEL 2 B ATTAKD BY TEH THING YUO CANNOT SEA!!!!!11" (My answer: "The same as it feels to be shot by an ordinary camouflaged enemy hiding in the bushes I suppose."), the highly gratuitous Raikov injoke, The Boss on her horse (was it white? It must have been, or else I wouldn't have laughed so much), and The Fury, who just struck me as a bit of a dick. I enjoyed the challenge of having no radar, it was more realistic that way (Soliton Radar wasn't exactly developed until the 2000s), but it's not much help if when moving towards the right, the camera decides to track you in such a way that you fill the right hand side of the screen! That's like running backwards! The game didn't take me long to finish, but once I did it was the last time.
Final Fantasy 10! My initial hatred of this game was legendary amongst my peers for its irritating protagonist, poor voice acting and long, unskippable cutscenes (I'd usually skip spoken lines once I'd read them... when it let me. Anyone remember my old topic in the FFX forum?), but after I'd gotten past all the linear parts of the game, I finally grew to love it. The game's battle system had already made me keep on playing as CTB was just so fun for some reason, and I was overjoyed to esentially have my favourite Time Mage as the main character's Job, even if he did piss me off!
So there you go. Don't any of you ever say that I don't give games a chance now, will you?
Note: I have a very strong feeling that this thread is gonna be full of people citing FFX-2 as an example. I also predict that I will be flamed to high hell for my first two examples, as well as my honorary mention.
Other note: I also think that games aren't supposed to be given a chance: They're supposed to not be crap.