Bands /artists that I hate more because their fanbases are complete tools:
Cradle of Filth
I could continue, but I think this translates the point well enough. I don't even necessarily hate the bands in every instance outright. The fans make some of these bands intolerable. "OH MAN HERMAN LI IS THE BEST DID YOU SEE HOW FAST HE PLAYS?" Dragonforce is fucking awful and so is your face. Slipknot calls their fans "maggots", even they know how stupid you have to be to like Slipknot. Slipknot knew they were so bad that they killed off their own bassist. That's the story I heard anyway.
Muse is more over-appreciated garbage. They had okay early stuff, and then gained popularity. Ever since then, any semblance they had of any song writing talent apparently went down the toilet. Matt Bellamy is unbearable and so are his kiss-ass fans. They're so far in his junk that you can taste Bellamy-taint on their breath. It's sickening.
Ever insult Dream Theater to a Dream Theater fan? Good luck with your 9 paragraph rant and link assault for the next hour. They will shove Dream Theater's technical prowess down your throat until they die. You know a Dream Theater fan starts getting desperate when they're defending the lyrics to "The Count of Tuscany."