From T2, to Jurassic Park, to the Matrix, Lord of the Rings, Pulp Fiction, Eyes Wide Shut, Fight Club, Cruel Intentions, Mean Girls, 5th Element, Independence Day, etc.. etc..
Something happened after 2007-2008, perhaps it was the shift to digital, where filmmakers started relying more and more on special effects, and less on good acting and storytelling.
The first Iron Man and Avengers were great, but then the formula got very repetitive. None of the DC movies were good, Fast and the Furious are the same story on repeat, both comedies and romantic movies became dumber/more simplistic etc.. etc..
Movies became more like a circus show of forgettable digital effects and less about a good story that teaches something or leaves an impression.
I think streaming might be part of the problem (just lots of churn of a large quantity of low quality movies), but also the box industry started revolving too much around few large franchises, and everything else became a low budget niche.
I think there were still few good movies (Interstellar, Gone Girl, Midsommar, and Parasite), but still much fewer than the previous generation (91-2007), which I think it was a golden time for the movies.