Someone once wrote about a general pattern for playwrights in America. Their first play flops to terrible reviews. Their second play gets terrible reviews, all noting it wasn’t as good as their first play. Their third play gets terrible reviews, since it’s no where near the quality of their excellent first play. Their forth play gets terrible reviews, comparing it unfavorably to their first play, not recognized as one of the major works of modern theater.
the Bee Gees
OK, technically you can’t say that “everybody” used to hate them, since they all went multi-platinum in their day, but I distinctly recall that it was not considered “cool” to admit liking any of these acts back in the day.
Back in the late '60s/early '70s, the rock cognoscenti (headed by Jann Wenner and Rolling Stone) actively loathed Led Zeppelin. Nowadays, they’re considered (by many who used to regularly pan their albums and concerts) respectable rock elder statesmen.
Something similar, if more muted, happened to KISS during the mid-'90s, (coincidentally?) surrounding the reunion tour, complete with makeup, that featured the entire original lineup. But Gene Simmons and Paul Stanley and their insatiable lust for the filthy lucre have done their best to largely squander whatever critical cachet and all around goodwill they’d built up during the last 15 years.