The low rating is one big joke. We're talking one of the best horror/thriller films I've seen in years. Excellent story-telling/writing, poignant atmospheric production design/photography, great acting, incredibly well-done practical special make-up and wonderful direction.
The film was obviously inspired by Adrian Lyne's Jacob's Ladder (1990), one of the best films ever made in film history.
Also what you need to know is that Faceless comes from Marcel Sarmiento, who earlier shot the absolutely phenomenal Deadgirl (2008) and who also served as an executive producer for The Exorcist: Legion VR video game (for me, the scariest VR game ever), just to highlight that this guy has a lot of passion and creativity for the genre. I only hope he continues expanding his horror legacy.
As for Faceless, it's a must-see.