Another vote for Rush. In fact, I harbour an irrational resentment towards then for stealing my musical youth, so to speak. Loads of great music around in the late 70s/early 80s, I realised later, but what was I listening to at the time? Bloody Rush. And the thing about being a fan is you sort of force yourself to like the band’s stuff. I remember listening to new Rush albums over and over until I liked them, then one day it hit me that the reason this was necessary was that Rush weren’t actually very good.
(actually, I still like a few of their songs, but in the grand scheme of things I think they were a pretty mediocre band.)