It's great for what it is. Why the low rating?
As a slasher movie with lots of gore, this movie really delivers. I don't know why it would get a low rating. I'm not so big on these kinds of movies, but I saw it anyway, and I was surprised at how violent and gory it was.
I hear all this garbage about, "bad acting" or "bad editing", but who cares? Number one, I doubt these posters know anything about film editing. Number two, in what way did the acting not match the material? It's a movie about a slasher with a skull mask. Were you hoping for Meryl Streep? I'm trying to think of any slasher movies with BETTER acting, and I can't. OK, Brad Dourif in the Halloween movies, but everybody hates those anyway.