This is such an annoying, but typical, example of the problems with internet discussion.
@Koeitje was responding to folks like
@Sal1950 who was asking if the films were well-known - the idea being that if they were super-niche "art house" films, then they wouldn't necessarily count as the kind of high-quality, mass-market movies that you and others have been discussing. And you should know that, except you've now apparently become laser-focused on trying to beat Koeitje in an argument instead of responding to new developments in this discussion.
To put it more simply, Koeitje's point is not that these movies are good
because they won Oscars and have A-list celebrities - he was just noting those facts to help explain to Sal and others that these are in fact major movies seen by a lot of people, just like the movies you and others love from the "good old days." The reason Koeitje thinks these movies are good is because, well, they're good! In other words, he feels they have precisely the qualities you admire in films.
You also appear to be substituting your own personal preferences for what you find entertaining with what other people might find entertaining. I found Three Billboards immensely entertaining. Was it "fun"? Not in the way Superman 1978 or, say, the Fifth Element was fun - but yes, it was a lot of fun in the sense that I enjoyed it. And to be even clearer - because I am 99% sure you need to have this explained to you - I did not enjoy Three Billboards because I was sitting there in the theater feeling self-satisfied that it had the "right" politics or that I was a good person because I was watching it. No - I actually enjoyed it in the sense that I was drawn into it, I found myself caring about the characters, absorbed by the dialogue and the direction and cinematography, and emotionally invested in the story and the outcome. It pushed different buttons than the Fifth Element did for me, but it still pushed buttons.
So if you find too many of today's movies to be unentertaining, fair enough - we all are entitled to our preferences. But that's not at all the same argument you entered this thread making.