It depends how people look at it, I find it a very aesthetic movie. Not just the filming itself and all the landscapes.
The main characters itself already portrayed the two different kind of people in the world. The girl was weak, the boy was giving her hope. The girl in the end was just giving up on hope or let's say that she never had in the first place, maybe just a hint of it along the way. The boy was making an effort and was staying strong for both himself and his girlfriend but the girl simply didn't even try.
I like how they view the world differently, especially the crashed plane. The boy finds beauty in everything around him, the girl, just find them dead. Address her as realistic, maybe.
Maybe we all didn't like how this ends. I would still like to say that. The world didn't give up on her, she gave up on herself. Still, its a beautiful movie to ponder 🙂