This review may contain spoilers. I can handle the truth.
This film IS horror.
That doesn't necessarily make it good (although I think it is), but man, what else could be more purely horrific?
Terror on physical, emotional, and psychological planes.
Isn't that we want? Don't we come to a "horror film" looking to leave a bit scarred?
The metaphorical/gesturing mental illness and grief angle may be a little loose, but that's probably for the best in a film this tonally broad.
And I do think it's broad, rather than…