I think the cinema is worse because the viewers are worse, and the writers are worse. We've bred a group of movie goers/viewers who aren't doing anything beyond consuming content, and these people don't give a fukk about art. They couldn't describe a human feeling they got from a film beyond "ok can't wait for the sequel/prequel."
There's also a constant push for films and television to adopt and regurgitate views/opinions of various social groups. I'd have no issue with this if the writing was halfway decent but instead it's constantly terrible. Clunky, blatantly forced, in-your-face and you can often tell which Tweets influenced the dialogue. Film being influenced by the times/social views is nothing new. Peep the cynicism and American disillusionment in 1970s cinema for instance. But compare that to today and you immediately sense an inability to write anything subtle, a refusal/inability to tackle controversial or opposing views, and nonstop child-like pandering. The audience wants simple shyt. And the audience is in a perpetual state of adolescence. We've gone from people debating the meaning of films to arguing over whether Spiderman would support [insert progressive political issue].
This is well thought out.
Each era of cinema reflects society as a whole, at the time, and trends within the world of movies. Trends, and techniques, and styles, and advancement of technology. It's why movies like Casablanca, while great, to me, don't compare to how gorgeous film looked, and how editing improvement made it more involving, and less kind of stunted. That also reflects my age too, as I was born in 1985. The excess of the 80's, the WASPY sentiments, the existentialism of the 90's, in a thriving US economy. The kind of growing distrust in society. Fight Club, American Beauty. The 2000's were interesting. More patriotism post 9/11. But, also reactions to a changing cultural landscape, Brokeback Mountain for one, James Bond getting the rougher rebrand, as a kind of mercenary, man without a country.
So, this 2020's era is going to reflect society at large, as you very well summarized. Lots of nods at progressive causes, lots of messages that are one size fits all. The Taylor Sheridan way of trying to check every box, and kind of self protect from any criticism. Consumable, cheaply made, blandly filmed, I swear Netflix has like a filter that washes everything out on a large amount of their stuff. The edges are all shaved, there's no beauty in the shots. But, they also backed Saltburn, which is pretty dope, despite some of it's flaws, I think.
I saw over 30 movies this year, and there are some great ones. The Killer, Killers of the Flower Moon, a half dozen indies I have seen this year are excellent and worthy, flaws and all. Fair Play. BlackBerry. Air. Scream 6. Ferrari later this year.