Honestly, you have to be pretty low to stuff on someone else's art, no matter how bad it is. You could simply avoid being a douche and just say 'hey i dont like x.' Instead you have to hate on something that takes more time and effort than you can ever imagine. These people work very very hard to please their fans and make something that people can enjoy, while you spend 10 minutes preparing an essay on how and why they suck.
If you want more validity, try investing in recording equipment, spending hour after hour writing songs, and going on stage several times a week to perform in front of 3 thousand people.
"some things are bad" makes creating topics over any issue also pointless. we're really breaking new grounds here.
if something is objectively bad ie a stuffty user or bullstuff event, you have a reason to post a topic on it. what sense is there writing thousands of 'i dont like x >:(' topics when you can just not say it in the first place since nobody really needs to know or care about your music tastes? i mean cmon its music. everyone has different tastes. I hate country music and you dont see me going off on topic tangents about how all country music is dumb.