https://en.wikipedia.org/wiki/List_of_Billboard_Hot_100_char...
ETA: And "worse" in these studies tends to be defined in terms of measurable qualities where contemporary pop music most differs from "classical" music.
There's so much great new music being made every year, new genres and ideas, etc. Film music seems better than ever recently. Especially for TV series. Lots of new styles emerging there too, see Mac Quayle for instance.
The really good, modern music was almost always on the fringes, and there's more of it now than ever before.
There might also be more garbage, but there's no need to listen to it.
There is an overwhelming amount of good music out there. Pick an album top 50 list from 2022, for example fantano's, or pitchfork, check out bandcamp's staff picks, listen to other musicians that are on the same label as your favourite band, keep an eye on things like NPR Tiny Desk, KEXP, la blogothèque on YouTube.
Just start listening. You are almost guaranteed to stumble upon something you like. It won't come to you algorithmically but the effort required is really low.
My favourite new album I discovered last year was Immanuel Wilkin's The 7th Hand [1], I stumbled upon it by going through a top 20 jazz albums of 2022 list to see if I had missed anything, and it immediately jumped out at me as being exactly the shit I'm into.
The brothers Rosling have a nice talk about how all the big stats are improving globally (gender equality, education, health, extreme poverty, life expectation)
The stats on the planet we live in are bad and getting worse. There is 30% more carbon dioxide in the air now than when I was born.
All the improvements in gender equality mean nothing compared to that and the trend behind it.
Computers can already generate every possible waveform that can be heard by human ears. There's nowhere else to go. Anything above 16kHz is useless and can't be heard anyway.
I'm not too sure about end of history, there might well be other genres and styles popping up. Just because we always had the ability to paint on a canvas doesn't mean pointillism or cubism didn't emerge. Just because we can put any letters on a page doesn't mean new genres of fiction didn't emerge. The fact that we can generate any waveform is analogous to these (ie, having complete control over a medium) and doesn't indicate anything about what might emerge in the future.