The thing that makes me angriest isn't bubblegum pop - in fact, I like bubblegum pop sometimes. What really makes me furious is"serious" bands who are a) shit and b) hyped by the music press and scenesters.
Examples from recent years of bands like this who make me cross:
The Libertines (and all the other Pete N Carl (tm) offshoots)
The Kooks
The Twang (NME reckons they're amazing; I agree with Lauren Laverne and say that they sound like Pete Doherty doing U2 at a karaoke bar)
The Fratellis (noticing a pattern here? - there are a lot of "The" bands here)
And many, many more.
Oh, and bands that make 21 year old music journalists all excited because they do drugs. It's such a boooooring rock cliche, and yet the hacks still lap it up...
And another thing.... bands who think being working class automatically makes them better than everyone else, which is another stupid cliche perpetuated by the press.
So c'mon, where's your grrrrrrrrrrrrr?

