"Along one day came Nirvana..." Coincidentally not 5 minutes ago I just finished watching the documentary
Hype about the Seattle music scene (aka grunge) and posting about it in the movie thread. Nirvana didn't ruin music, nor were they the first to make the kind of music you're bitching about. They were just the ones that big labels and the media exploited the most.
Aside from that, how is it their fault that no one after them has made rock music that YOU like?
Plus honestly your opinion doesn't hold much weight when you're praising bands like AC/DC, Van Halen, and Def Leppard. I don't really have anything against them, I liked each one at some point in my life, but come on...they're hardly worth calling "awesome talent." And for the record I wouldn't use the phrase "awesome talent" in reference to grunge bands, either. I just happen to enjoy some, doesn't mean I think they have "awesome talent."