I don’t know what the critics expect a horror movie to be like, but his movie definately had one of the greatest plot twists in our time. It may be a “Generic“ in critics terms, but it was definately very surprising. Even on my 2nd watch, I was astounded by the ending which says a lot for a “Generic” Horror film. There were some slow parts to it, but then the movie brilliantly explains why.
When a critic rating doesn’t match up with audience ratings, it really says a lot about that industry.