The idea older movies were better is just selection bias.
Pauline Kael said: “If you love movies you must love trash because most movies are trash” (I’m paraphrasing).
There are “golden times” when a lot of good directors and writers were allowed to make great work - often because their work was profitable - and then times where the corporate machine took over. But that’s geofenced. Hollywood was creatively strong in the 70s and oppressive in the 80s, but Honk Kong was killing it in the 1980s.