I’ve seen the movie a few times and no part of it is confusing. The movie and the story it tells is coherent and, I dare say, pretty obvious. It’s unfortunate that you were not able to follow it, both because of your obvious dissatisfaction and because now you’re making a lot of bad posts.
This film is definitely a trigger for me, so I'll concede that I'm over-reacting. However, I do not believe the ending was easy to follow, not just because I didn't understand it, but because I've never heard anybody who's only seen the film say they understood it either.