Thas a tired cliche though. There was alot more than just glam rock. Punk was big, new wave was big, heavy metal was big etc,etc and to make it worse alot of them so called grunge bands like say Alice in chains for example even started out as a Hair band
and for all its supposed revolt you still had bands like Bon Jovi and Firehouse having hits right in the middle of Nirvana and such. The notion it was a counter movement against glam is largely a myth as many glam bands died out from a mixture of drugs/burn out before that scene even broke and many of the acts that came later either played that kind of music when they formed or didnt have a problem with it.