this tracks the music critique I read, but I'm not sure how it generalizes to other art with different culture.
I am not that much of an expert in any other form of art, but the general impression I get from art exhibitions is that they're also focused on the themes and the artistic expression, not so much on showcasing how impressive it is (and indeed
some of it is incredibly unimpressive). Film awards generally go to films that are exceptionally relatable (at least in a concrete enough way that it can be easily analyzed and explained to justify the award), not exceptionally difficult, and I feel like so do book awards. And it's definitely the relatable works that become popular.
Also, isn't like modern classic (which has a different culture) this thing that's hyper complicated and sounds like shit?
Well, no. It is a bit of an acquired taste because the ways in which composers express themselves in contemporary classical music can sometimes be pretty radically different from traditional classical music, pop or other things that most people are familiar with (but actually not
that different from e.g. modern jazz or progressive rock, and these three styles even live in a kind of symbiosis where they all get influenced by each other nowadays, with jazz largely acting as the intermediary between prog rock and contemporary classical, which have a weaker direct link — so it's relatively easy to acquire the taste if you already like the other two), but they are absolutely expressing themselves and connecting emotionally with the audience, the audience is just a bit limited in size. And in fact because the music is kind of complex, so are the emotions being conveyed, and it can become a super intense experience for the listener or the musicians performing the piece so much that you completely forget to even think about whether it's impressive or not.
Many pieces are not even super complicated, and often these are still recognized as good and tend to be relatively popular: