Taylor Swift sucks. John Mayer sucks, but that's not really a secret.
uh. Nikki Minaj annoys the piss out of me.
Oh wait! I hate a lot of Christian bands, specifically speaking, Casting Crowns. They're the Nickleback of Christian Rock.
Every member of Black veil Brides/Attack Attack/ Brokencyde or any other scene nonsense.
Every member of Relient K / Thousand Foot Krutch / Skillet or any other Christian rock nonsense.
Every member of Take That / Westlife / Blue or any other boyband nonsense.
Nickelback. Shirley Manson kicked their asses. <3
Bono, Bob Geldof or any other self righteous prick of the kind.
Off the top of my head.
Generally I hate people who have opinions about music and won't shut up about them, so I've only chosen the worst of the worst.
U2, Madonna, Lady Gaga, Birdman, Lil Wayne, Bruno Mars, Chris Brown.
The last of which, I got to eavesdrop on because I was working back stage. He quotes his own songs in real life and things like that. He quoted "I got boat load of Asian hos" from "Yoko Ono". After he said it he clapped because he's so cool and he thought it was really funny. He just toots his own horn all day probably. I mean like when he's done physically abusing women.
Nicki Minaj and Avril Lavigne are both embarrassments to the word "music". And I'm definitely not a fan of LMFAO ever since "Sexy and I Know it".
Other than that, I don't really hate anybody else. Not a fan of country though, and I find punk rock-y stuff like Blink-182 annoying because of the vocal style that genre uses. It would be good music if not for the whiny voices.
I really dislike any sort of designated teen pop/rock specifically the kind with a male lead. You know those bands the guy has this really sugar coated sweetness to his voice it just makes me want to punch things.
Same with any alternative rock where the guy sings in that insufferable whiney tone. Bleh.
I'd include examples of bands but I can't really think of any, because it's just something I try to avoid hearing at all costs.