Letterboxd
Evidently based on a novel. If I had to guess what went wrong here, I would say that it is an adaptation where they took all the characters but then sketched them out so thinly that it was difficult to understand the motivations for any of them.
There were all sorts of lines and scenes that just didn't seem to have a purpose, but that might make sense if you could fill them in by having read the book. Maybe?