Misanthropic, perhaps. You’ll struggle to find many sympathetic characters anywhere.
There are aspects of it that people might find troubling. My best approach would be to take it as it is, a not very serious genre thriller. But like @caze says, you can’t talk about it without spoiling it.
Well, I did read the book, and I don’t imagine the movie is much different in the main. The woman/wife in the book comes across as maniacally deranged and devious, but 1) I don’t think that she’s set up to represent all women that white (nor even all middle-class white women), and 2) I think her parents’ and society’s expectations of her to fill certain idealized roles were as much or more the target of blame as “women” of any sort.