re: amazing films in the 90s vs. being bored now. Don't you think part of it just getting older?
When I was in my teens and 20s I remember being so annoyed with my parents for not wanting to engage with difficult or interesting movies.
Now I have a job and kids and health problems and I am perfectly happy to watch Free Guy or Spiderman and I can't often bring myself to watch international/artsy movies anymore. I get it now. I don't need to be challenged or depressed by movies -the real world offers plenty of it.
That being said - I still loved Everything Everywhere All at Once (and my parents hated it!). I enjoyed Spencer because it was well crafted and had a very clear vision, and spooky vibes. Palm Springs was fun! But beyond those three I can't think of another indie movie that I've enjoyed this year. Dune felt like an indie but with a monster budget and it was beautiful, but I was bored. Production design and a great DP can't save a movie.
My husband I noticed the same thing, I think it started at around age 40, and it extended to books as well. We were used to really engaging emotionally and with excitement with media in our youth, but I think at a certain point there's a flattening of the curve simply b/c fo what you say here (less emotional bandwidth and energy to engage with hard/challenging material, and more everyday existential demands and distress that reduces your desire to engage with material that might also be difficult or distressing) and also simply b/c by age 40 we'd seen or read many variants of the same stories or themes already.
I have found that I do a bit better with this if I simply force myself to try stuff that I'm not actively excited about, b/c I often do end up enjoying it to some degree, but it is tough to find things that I feel truly excited about/rave about the way I did when I was younger.
I also think that movies have changed a lot in the past 20 years. The international market dictates more of the movies that are made (super hero movies, most of which I find only mildly diverting) and certain genres have become much less common (costume/historicals, rom coms), so movies feel a lot more 'samey' than they did in the 90s and early 2000s.
It is interesting that when I look back on the past couple of years of viewing, most of my 'favorites' are not new movies, but either old movies or tv shows (tv is where it's at now, IMO). Having said that, recent movies that I found interesting/entertaining and would recommend (to the right audience) include The Dig, Da 5 Bloods, Promising Young Woman, First Cow, Midsommar, Barb & Star Go to Vista del Mar, Another Round, Arctic, the new Emma, Pig, Eurovision Song Contest, The Last Duel, The Power of the Dog, West Side Story, and Dune. Granted, I don't feel like truly raving about any of these, but I'm not sure I really expect that super intense emotional response from films any more...
ETA: I laughed so much at malcat's 'Grandpa Simpson' type hypothetical "back in my day" conversation. But honestly, I think it's a little unfair to put your average movie up against LA Confidential. Sometimes a movie is kind of a world-shaker AND has also holds up to rewatch AND sometimes even has a lot of cultural relevance decades later (I was thinking nostalgically of how awesome moviegoing was in 2007, even despite my developing apathy back then). But not many movies are as good as LA Confidential, even back then.