Mmm, kinda. I think some of that's a bit of an illusion—I suspect there's a tendency to remember the dozen great original blockbuster movies that came out in a decade, and forget the hundred sequels, cookie-cutter genre movies, and other crap that was
most of what was coming out. Even now we get something good that's also a big highly-promoted spectacle movie maybe once a year, but we do get ten or more mediocre-to-terrible ones for every one of those.
Music's a lot easier to check out quickly than movies, so yeah, it's just easier to keep up with, especially these days with Spotify and such. I've found TV easier to get into lately because there are sharp cut-off points pretty regularly—I hate having to leave a movie unfinished and return to it. Fortunately, there's been a ton of great TV in the last couple decades. I've also been really appreciating when I can find a tight 90-minute film instead of a 2+hr monster, which is way more common outside blockbuster-film territory.
Finding a critic with taste similar to yours, who writes frequently enough to cover plenty of non-blockbuster films, helps with discovery. I've personally also had luck watching basically anything A24 puts out. Very rarely been sad I watched one of their pictures.
However, it is the case that some aspects of big blockbuster movies are simply worse now, more often than not. The original musical score situation in particular is notably dire, as has been much-commented-on and the causes analyzed in great detail by film-nerd Youtube. So-so directors and editors have arguably too many knobs they can cheaply and easily fiddle with now, leading to things like heavy-handed and poorly-motivated color grading that looks like crap. A lot of CG still kinda sucks, including cases when it's replacing relatively-simple practical effects and not doing something that would have been nigh-impossible otherwise. And Disney discovering the sweet spot of just-bad-enough-to-save-a-lot-of-money, but just-good-enough-to-sell-well with their films has probably been a bad thing overall, especially since they own half of popular culture now.