I find it interesting that GenZ and Millennials show a much smaller preference for their own decade's music. https://substackcdn.com/image/fetch/f_auto,q_auto:good,fl_pr... The 1980s are still doing quite well among all but the oldest generation. Is it possible that music may actually be getting worse? Corporatized, consolidated, computerized. Look at Hollywood now too: everything is a sequel, prequel, remake, reboot…
Music is absolutely not getting worse unless you're only considering top charting music which is such a small fraction of what's out there. Even then it's highly subjective and behind almost every one of those songs or albums is a handful of brilliant writers, producers and session musicians you probably never heard of. I'd say it's never been better. Music is more accessible which means more folks get exposed to it…
As an extreme example, I'd argue the popularity of David Hasselhoff's I've been looking for freedom in Germany is almost entirely a result of "retconning" (if not fabricating) its supposed popularity at the time of its original release. It would have probably been forgotten entirely if it hadn't been rediscovered "ironically" in the context of ridiculous claims about its influence on the fall of the Berlin Wall. Heck, I remember owning a casette of the album as a kid only because "it's the guy from Knight Rider". For adult women his claim to fame was co-starring alongside Pamela Anderson in Baywatch as one of the few men regularly appearing bare-chested on daytime television - I'd say his musical talents played a very small role in his original popularity and it's telling nobody remembers any other songs than the one he performed on a TV show. He was never considered good, he was just a familiar face (and body) and made a catchy tune.