For me, there are a few I could mention but only those few.
If I don't like a game / think it's bad it goes to the big hard drive in the sky (and depending on the copy protection subsequently off to ebay) just as soon as I've checked to see if there is a patch that makes it playable.
ArmA 1 & 2 - although I know I'm not alone here, I also know both games have a huge fanbase - I honestly loved OFP1 to death but ArmA 1&2 have been unplayable for me from the outset. Mostly game performance was the culprit, even though my rig trounces the recommended specs twice over.
Alpha Protocol - as others have said, broken gameplay but the dialogue system and the choices you make are fantastic, as is the story. No wonder Bethesda snapped up Obsidian.
Starship Troopers - no really they made a game! terrible in most respects but I have the same blindness to flaws with this that I do with the films (the first one atleast). Great fun I thought
Prince of Persia (2009 I think) - ubisoft's failed attempt at a reboot for the series, shortly before the film and subsequent sands of time redo were announced. Got bad reviews, was on sale for a fiver 2 months after release... I actually found it quite fun. Has its flaws and yes it is repetetive but it was a good thing to zone out to. However if you get this for the PC, it's only playable with an Xbox controller. don't even try the keyboard, it's awful.
I think that's it - any others I think are bad just get deleted - my list of those is much much longer
p.s Too Human should get an honourable mention even though I returned it prematurely (rented) because I got frustrated with the controls and apparently digital learning cliff required to play and actually kill things.