This film does'nt worth of thinking about it so much

I read many explanation about the meaning of this "film". I get the main idea is about ego (I think Green had lost his wits in the black hole, and the whole story take place in Green's mind), but I think this is an ovverrated movie, with many plotholes. I am surprised, how many people try to eplain the story, and watch the movie again and again to understand it. But this is'nt a good movie that worth any effort to make it sense.