Nobody else to blame but themselves. Of course, Hollywood is full of narcissists so they'll blame everyone else, e.g. streaming, prices, etc. but the reality is of the last 10-15 years of mainstream US cinema is:

- Scripts that sound more like an HR meeting than a good story.

- Blockbuster superhero movies that are all the same movie.

- Lots of remakes that added modern CGI flare and destroyed the artistic value of the original.

- As consolidation of studios happens, way more "safe" stories that aim to not offend anyone. I think the only one able to get away with it right now is Tarantino.

Prices, streaming, theaters, etc. -- they're all accessory to the problem. People went to the movies for enjoyment, why would they go to endure them? There's no cultural collective experience anymore in the sense of going to see Lord of the Rings or Matrix with your friends for the first time.

Also this is happening throughout all media. Music and video games have the same kind of discussions.

Hollywood seems to have never realized that the point of works like LotR and Star Wars was to take the ridiculous extremely seriously. The bad CGI didn't matter because every actor took it seriously. A marvel-ized star wars with great CGI is still a bad movie because nobody on screen takes it seriously despite how realistic the graphics are.