It's a pretty screenwriting 101 level of symbolism. Why does that make it brillant?

The poster successfully conveyed the insight that made it brilliant film for them and their enthusiasm makes me wish to see it again.

I don't know what practices are actually taught in 101, but the greatest artists won't be those that think themselves above them, but those who really appreciate them.

You wish to suggest you are superior but multiple stories to give different angles of a concept isn't symbolism, its a theme. The narrative structure is definitely unusual in the genre, frequently described as clever/innovative by reviewers and stands as a substantial achievement to have brought so many stories together successfully. None of that means you have to like it but the cheap middle-brow dismissal fools no-one.

The "how" is more defining than the "what". All bloody kill-em-all movies contain bad one liners, swearing, guts, as-much-almost-nudity-as-allowed-on-tv, etc. But there's a difference between any Tarantino movie and some all-star Rambo-like movie which came out this year.

I don't think that part implied that the movie is brilliant but that the movie is brilliant in itself as a work of art.