Dude get a grip.
In Flames isn't a bad band. Whether you like gothenburg or not they're pretty good at what they do.
Shadows Fall are Thrash, not ***core of any kind. I think they're the best new Thrash band going right now.
You do, as AngraRules suggested, seem to think that Progressive is the only metal genre worth listening to, and Power is tolerable.
I don't go to Ozzfests because slogging through 15 bad bands to listen to 5 decent ones isn't worth the time to me. Ozzy's hasn't released a decent album since Jake left, so he's no draw for me either.
But I won't boycott. If the lineup was worth going to see I'll go. If Ozzy releases something I like I'll buy it.
Iron Maiden and Bruce Dickinson are big boys, and they can fight their own battles.