Pretty much any western developer - EA, Activision, Dice, Bethesda, Crytek... also SE for keeping pushing FF XIII down people's throats. Capcom for being really money hungry pieces of shit.

From the ones that I have played games from it would be:

Platinium Games - I just hate the gameplay style in their games

Nihilistic Software (now nStigate or some shit like that so don't get fooled) - because pretty much every game of theirs basically suck balls hard, one of the worst outsourcing decisions by Sony.

Insomniac Games - for the mismanagement of their franchises, bad business decisions and falling quality.

Rare because they were incredible under Nintendo making Donkey Kong, Banjo-Kazooie, Goldeneye, Perfect Dark so many classics (they owned the N64!). The next thing you know they are bought by Microsoft and have released so many poor games and not even that many at all. Once a legend, it is a mere skeleton of what it was. Such a shame, as Rare used to be one of my favourite developers

SQUARENIX !!!!! you can not argue with that, everything I used to love about them just vanished somehow.
EA is not that bad, it gives us FIFA that's what matters to me.

EA

I'm wondering when some of these "EA" replies are going to start getting narrowed down. Which developer in particular do you all have a beef with? EA Canada? Maxis? Bioware? Criterion?

Because as much as I can understand a problem with EA-the-questionable-business-practice-pushing-publisher, I don't think they individually have any bad development studios.

Just popped over to TrueAchievements to quickly see who was responsible for this gens Alone in The Dark........

Therefore its Eden games for me (they also made Test Drive Unlimited, further proof of how crap they are)

SE is also a pubslisher and not a developer.

Grab the most recent NFS: Most Wanted.

It's literally burnout by another name.

Square-enix has internal development teams, so they are deveopers aswell.