I listened to Radiohead's OK Computer a few times. It was awful. Radiohead is just bad in general.
I listened to Creep and remember how Radiohead can't sing for their lives. I also can not relate a song about being a creep.
I listened to Karma Police and the musicality is horrendous. Boring rhythm, horrible pitch, nothing really interesting going on.
I try not to compare a lot of popular music to the most gifted composers (I am a classical singer, my music Library is primarily classical/operatic), but if it's bad, it's just bad. I'd rather listen to a Tiesto, Nickelback, Usher, Kanye West or any other generic popular music than Radiohead.
The English/Brits/Scottish (whatever, I can't tell) have some great bands out there (Coldplay, Snow Patrol) but Radiohead isn't one of them.