Literally everyone's preferred era of music is someone's "todays music is bad rabble rabble." Even classical was considered inferior and simplistic by people who preferred music from the baroque period. Like its original critics literally said that classical was too repetitive.
Ravel's "Bolero", anyone? I hate that composition. Even Emerson Lake Palmer couldn't fix it.
(Incidentally, I do find Classical music quite repetitive — although on the other hand I’ve long enjoyed Boléro. Curious!)
My gripe is the newer recommendations algos seem worse than those from 10 years ago, like there was nothing wrong with simple "people who liked this song also played these songs" I listen to many genres so I think my listening profile is a bit diluted/varied