This is a really bad movie, and not a horror

I am very tolerant of horrors because I love the genre and if the movie offers something interesting, it doesn't have to be perfect for me to enjoy. I expected this to be an ok movie because I saw it mentioned in combination with some other horros I enjoyed, and because 6+ rating on imdb for a horror is usually reserved for the more solid ones.

But *beep*, this was horrible, actually embarrassing. The characters were so poorly made. Who the hell talks to their students like that professor did, even before the rape incident? Everyone's behavior (except maybe Billy's) was so one dimensional and exaggerated.

"*beep* Mary, you're *beep* up my class, what the *beep*? Don't *beep* up again." Lol.

The body modification thing maybe could have been interesting, the doll lady and Betty Boop we're disturbing to look at and exploring the mentality behind it would have been interesting. It was cool-ish that the danger comes from the doll's boyfriend, but that potentially intriguing part was totally neglected. Instead we watch Mary being edgy and nothing ever developing into anything.

I don't even know why this is a horror. I am ok with calling non paranormal thrillers horrors if the main atmosphere evokes fear or discomfort, but this didn't have any. It was as if a teenager wrote it.