AC/DC - Bon Scott era is okay but not exciting, BJ is not my cup of tea, fan base is annoying, everything after Hells Bells is cringe.
Led Zeppelin - everybody loves them because everybody loves them. 3 good songs are enough to become a legend, it seems.
The Doors - if Jim Morrison had not romantically died, nobody would even remember that band. There is a great episode on the podcast "Your favourite band sucks" about The Doors, and it hits the spot perfectly.
Queen - didn't even have their own style, they just randomly played everything. Would be ok if they were good at it, but they weren't. Some songs are so bad that they justify throwing eggs. Bicycle Race is a case for Amnesty International. To make things worse, a few of their songs are excellent, so I can't even hate them completely. Damn!
Korn - really, I can't stop laughing ever since I first heard them in 1994. How can anyone take this stuff serious for one minute? Even Doro is more psycho and evil than these clowns.
The Beatles - greatest band in the world, you say? I challenge you. Go listen to Obladi Oblada, Rocky Racoon and Yellow Submarine and try to say that again. Without laughing or feeling ashamed. You wont make it, unless you are dead inside.
Tool - musically I just don't care much. That could be all, but they have the most annoying, most elitist, most crybaby fanbase on he planet.
Rammstein - maybe if I didn't understand german, I would just find them boring. Unfortunately I am from Germany and understand every single word. Instant cringe.
Soundgarden - Down On the Upside and Big Dumb Sex are good songs, other than that I find them rather boring. Still better than....
...Pearl Jam, though - No good songs and awful singer.
The Police - they STING!! Yes, that pun was terrible, and I apologize. But it was still better than Every Breath You Take or (sorry, I try to remain calm here) E Doo Doo Doo E Da Da Da. Why is it even legal to write such songs?
Jimi Hendrix - yes he could play. Yes he did things no one did before. But that does not mean his songs were good.
Lynyrd Skynyrd - goddamn redneck yokels fulfilling every cliche.
Cream - Boring music and I just realized that I forgot to list Eric Clapton in my douchebag-poll. That guy is a red level asshole.
Manfred Mann's Earth Band - every hit, and I am not exaggerating here, EVERY hit they EVER had was a cover version. Most of them were actually Bruce Springsteen covers. They were basically his cover band, specializing on the most dreadful stuff Bruce ever wrote, tranforming it into dull hippy music.