There are good things being produced. Just, not by Hollywood. For example, Italy’s Gomorrah (the TV show, not the movie, which was awful) was/is probably the best organized crime show since the Godfather (actually, I think it is better). Bloodlines was excellent, as was the first True Detective, and a number of other shows. In fact, in many ways, we are living in the golden age of visual entertainment. But the movies that are produced now, are utter garbage — trashy, juvenile, uncreative, boring, and uninspiring.
It is too bad, since sometimes going to a theater is a good break. But these days, the real quality is produced for cable and streaming.
The financing of movies is a real problem. The only way it makes any sense to even make a movie at this point is if it is a tentpole that can create dozens of revenue streams for dozens of years.
To Hollywood’s credit, it has tried this with some original material in recent years. But generally becomes a disaster as people don’t want to dive into that much exposition/world building in a movie theater apparently. They want to come in knowing all the rules.
As others have said, Marvel’s worldbuilding works, because it’s really just our world tweaked slightly and Marvel has religiously followed the rules of that universe for decades. DC’s Universe has always been a mess (Multiverse), and at this point, DC doesn’t even seem to know what its characters are supposed to be in any universe. (This angry, vigilante Superman is such a disaster).
Meanwhile, tv budgets have grown to the point where you can get major stars and major writers and major directors tackling major themes that people will engage with over time.
In the 70s, the first season of True Detective would have been one of the top ten movies of the year in a condensed form.