The characters are all unlikable and barely characters. They're caricatures.
This has a really crazy disgusting scene and while it's effective and fits the character, it was...man I'm conflicted on that shit.
Fede has crafted some really masterful scenes of suspense including some nice tracking shots and a scene with night vision, but this is more of a concept than a story. So that's two for two on this dude that can't deliver a full film.