I'm quite sympathetic to this lol. There's quite a few people who think this and I think you could quite happily just go through lots of great stuff from the 20th century. So I don't feel like I might be the best person to dissuade you.
I wonder if this has always been the case, albeit to a much worse degree now maybe? Like yes you have Bergman, tarkovsky, Antonioni, felini etc etc but were these 'mainstream tastes' of their time? Maybe we just sieve the past of more crap and over time the gold has staying power?
I would give The Banshees of Inisherin a try. It felt a bit like a Bergman-ish film. That might be up your street. (No idea of you like Bergman tho lol)