MW2 was bad? You guys nearly played 'Turning Point: Fall of Liberty.'
For me, the most mind-bogglingly bad games I've played are as follows:
Turning Point: Fall of Liberty
Gameplay was a bloody joke, the story was completely implausible, the characters were lousy, and the game ended on an absolutely terrible note that was executed so poorly that it very nearly turned the game into a comedy piece.
IL2 Sturmovik
This is just bad. Unbearably, undeniably bad. The difficulty is either so incredibly easy that the enemy is too busy dashing themselves to pieces on the ground, on rocks, and on each other to pose any real threat to you. Or, if you crank it up, the wonky flight mechanics and complete lack of a plausible physics engine sees you going into a fatal spin every 3.42 seconds. But don't worry, the enemy is constantly stalling and spinning as well - it's just that they can magically recover and jump on your arse to riddle you full of holes.
Once you get the hang of it and stall slightly less, you can really shake things up and make a very slow right turn while climbing - guaranteed to cause enemy AI to freak out and go into wild spins, causing death. One of few games where you can genuinely be a pacifist and still win in the air, simply because the enemy will kill themselves off eventually.
Crysis 2
I liked it, don't get me wrong, but it's absolute shit compared to the original game.
Crysis was this massive, epic shooter where you had a plethora of tactical options in any given situation. You were never locked into a given path; you could sneak around, snipe from afar, lure the enemy into elaborate ambushes, use IED's, or directly assault like a bawss.
In Crysis 2, you basically only have one of two options - sneak forward and attack wildly, then retreat to let your health regenerate, or charge forward and attack wildly, then retreat to let your health regenerate. You basically only have one good weapon, which is the sniper rifle, and after enough practice with it you'll find there's practically zero need to pick up anything else because with the proper use of cloaking you could kill god himself with the stupid thing.
I played Crysis 2 before I'd played Crysis, and I'd marveled at it's... Well, everything. But now that I've played Crysis and Crysis: Warhead, I recognize just how terrible Crysis 2 is. It doesn't resolve anything left over after the first game, the voice acting is terrible, the gameplay mechanics have been dumbed down to allow it to be ported to an Xbox, and the level design has been streamlined and all but ****ing color-coded to make sure the hordes of screaming console kiddies can easily find their way from point 'A' to point 'B'.
Oh, and they took out all the destruction physics the first game had. There's nothing special about Crysis 2, and I suspect the same will hold true for Crysis 3 - mildly interesting, but instead of finding deep and interesting gameplay inside the box, you'll find an assimilated biscuit. The Biscuit of Borg. Sci-fi enough to say 'ALIIEEEENS', and boring and simple enough to appeal to the console generation.
MW2 and MW3
I don't have to explain this, do I? Same game, same terrible plot, same cracked-out multiplayer gameplay. I found them moderately enjoyable for the duration of the main campaigns, so long as I didn't think about anything. And I mean anything.
I'm sure there's more failgames I could think of, but I don't want to torture my brain too badly right now.