Oh no! Nirvana kick ass! I'm sorry that some idiots have caused you to struggle to enjoy the music you like. :-(
It can be difficult to break those psychological connections between morons and particular things, like a song or video games or a hobby.
Changing the association can help, though it can take a lot of effort.
I was a huge Nirvana fan. I started listening to them just before Kurt Cobain died. :-( There were a few people at school who decided to jump on the bandwagon and suddenly the music I listened to was cool. But, that would mean I was cool, at least in their minds. So they tried to co-opt Nirvana for themselves. It made me feel like my enthusiasm for Nirvana was inauthentic.
So here's what I did. One day I played Lithium on full blast and sang along with it at the top of my lungs and imagined I was sneering the lyrics at these poseurs! I played it again and again. I made it *my* song! I knew they would never understand, but my relationship to Nirvana was deeper and more meaningful than there's could ever be. And let's be honest, they were going to get bored of them sooner rather than later!
A year later, I was on stage with my band, belting out Lithium at the top of my lungs! What a feeling!
"I'm so happy 'cause today I found my friends, they're in my head, I'm so ugly that's ok, cause so are you, broke our mirrors, Sunday mornings everyday for all I care, light my candles in a daze cause I found God....YEAHHHYEAAH YEAH!!!!!"
Little bit of trivia, Lithium was written as a the result of a bet with Michael Stipe as to who could get the most repetitions of "Yeah" into a song. So REM's Man on the Moon is kinda lithium's half sister!
I wonder if those idiots who have spoiled your enjoyment of Nirvana would know that!?