The music industry has churned out tons of crap ever since "the music industry" ever became a thing. As far as my preferences are concerned, I'd say "popular music" in the 70's and 80's was a little better, but the 90's were a lot worse, and things have actually significantly improved since the wave of boy bands in the 90's. The 80's also brought us some really intolerable pop music. Don't get me wrong, a lot of pop music sucks, but not all of it. Some of it's quite good. Most of it's just boring rather than outright awful, I'd say. That's okay. Not every human being on the planet is a connoisseur of music. I like it that way.
But all of that doesn't even matter. All of the great music you're talking about still exists and is still created. It hasn't gone away. It's just gotten more accessible.