When people say a movie is "thought provoking" they usually mean the story made them consider the perspective of the character. Beau Is Afraid is meant to be an immersive, surreal mirror into yourself. The things that happen, and the story Aster tells does not matter as much as how you react emotionally to it. Beau Is Afraid is meant to be a mirror into yourself (There are several scenes through out the film where the camera focuses on Beau, and then the entire scene is inverted in a moment, not to mention how after the ending of the film looks like a giant mirror into the theatre)
Watch this movie. Let it happen to you. It's not meant to be consumed, it's meant to be experienced. You will walk out of the movie in a daze.