My viewing is pretty broad, I’ve seen these movies except Magnolia. What you are describing is the placing of a movie in a cultural context. This is criticism, not learning on an individual level. For example, take Mulan. I can generate a feminist counter-critique that the new Mulan is in fact better because women are born with special qualities men don’t have, and often are superior when given equal opportunities. This isn’t a lesson the movie teaches however, it’s academic bloviating.

I mean I think actual existentialist philosophers would laugh if you tried to tell them that Lost in Translation is an existentialist movie. Also I think you mean ennui not anomie.