Probably way too many to detail, but...
British blues that started in the 60s, it really makes me cringe. I think it's awful... Clapton, Green, Mayall and all the rest that followed. Howling Wolfe, Sonny Boy Williamson, Muddy Waters et al that's blues.
Loathe britpop with a passion. Glorified covers bands plagerising 60s and 70s material. God it was awful.
Don't like The Who or Rush. The Stones (lot of time for Keith, Ronnie and Charlie) wrote a few good tunes but most of it really dull. Always thought Faces were a much better band. Jagger always sounds constipated and is midway through 'pushing one out' when singing (same goes for the guy in Reef).
Coldplay = bedewttercore.
Most contemporary acts are really dull. I've got teenage kids I should offended by their music not bored by it.
I'm stopping now, I'm up early tomorrow 🙃