Uhhh... it's been a long ass time since I watched (was forced to endure) anime I don't like, ngl generally if I don't like it now I turn it off and generally forget about it. When I lived with my sibling though I endure a lot of pretty shit anime they liked cause my computer was in the same room they would watch anime on the TV with. I pretty much hated most everything they watched.
Weiß Kreuz
DearS (that f***ing "I am your slave" opening song omfg)
Angel's Feather
Disgaea
World Destruction
Uta No Prince Sama 1000% (I think that's what it was called)
A whole shit load of BL that I have no godly fricken clue of what the series were called (or even about) or how they found it or how they managed to find SO MUCH of it.
From the list available I had to go with DBGT and Groove Adventure Rave because... urg... I did not like those ones, but they were also not as bad as some of the series listed.