The opposite of love is not hate, but indifference. Said some wiseman who was quoted by Kelsey Grammer.
So in terms of that, I don't really 'hate' any developer/publisher that I can think of. There are those that I like and those that I just don't care about.
I know a lot of people hate EA and Activison. But to be honest I couldn't care less. I don't like any of their games so all of their BS doesn't really affect me.
I do however tend to have a love/hate relationship with Capcom. Especially for basically killing off Megaman and Devil May Cry, and then ruining RE (although they've made progress with Revelations and now seem to see that it was the right way to go. So I'll hold off judgement to see where they take the series.) And of course them chopping up games to have day 1 on disc dlc is downright insulting. But they localized Monster Hunter, so I have to give them credit for that.