It's honestly insane to me how many people are rating this movie 5 stars with the caption "I've only seen the trailer but this looks good!" It's infuriating.
The movie feels like it was written and shot by someone in an intro to film class with a high cinematography budget. Their set design is terrible--there's a Thanksgiving scene in the beginning of the movie, and you know it's thanksgiving, because there's about 5 plastic thanksgiving turkeys (and nothing else) hanging from the ceiling to decorate. The dad/girlfriend relationship makes absolutely no sense. It's suggested that the dad has some kind of journalistic career which provides no explanation for why he lives in a mansion and is forced to work during Christmas--abandoning his children, whose mother died 6 months prior, with his mentally ill girlfriend in the middle of the woods.
The dad is somehow worse than a cartoon father and yet his constant calm demeanor reminds me of my therapist. The kids are awful and have almost no reaction to a sleepwalking woman holding a gun. And the girlfriend's (Riley Keough) entire character is just Kristen Stewart in Twilight.
It's labelled as a horror movie, but you want all of them to die within the first 30 minutes of the film.