I'd go with Final Fantasy X-2, although not for the reasons others have mentioned. While I don't disagree with any of them, my beef with X-2 lies elsewhere.

Specifically, X-2 opened the door to sequels. As if one terrible sequel wasn't bad enough, suddenly FFVII gets an entire compilation (and only Crisis Core appears to be decent at all), most of which seems entirely forced as the game likely was never meant to have a sequel.

Given how much SE makes on these sequels, it's unrealistic to expect them to stop. I think that there's something to be said about the loss of the novelty of the independent titles.