There are a lot of reasons for this. One is this constant emphasis on NEW and DIFFERENT so that after a while, everything has been played out already. This is a starch contrast from just emphasizing what is GOOD.

Also, I have never really expected much from Hollywood once I understood how it worked. Think about it, profit is the goal. How do you bring in the most profit? Make something that is for any and all demographics...and the way they've done this is by dumbing everyone down to a 13 year old teeny bopper level (no offense 13 year olds). A lot of substance has to be thrown out in order to please so many different demographics and usually plot suffers. There are a few films that are allowed to be more complex in their storytelling, but for the most part it's just the same formula for everything. There are still a few decent Hollywood films but I honk most of that has to do with directors visions, the institution always wants to dumb things down.

Tv seems to be doing much better right now...maybe due to more competition, snd the fact that most of the good stuff relies on subscriptions on HBO Netflix etc. . I don't know how long that can last though, the underground always produces better art in the end.