People don't like this movie because
It doesn't have a villain that is easy to identify with. Everyone going to horror movies wants the villains to be troubled characters or monsters that they can relate to or think they can relate to. The normies don't have anything they can grab onto in this movie. The villain is a faceless, shapeless void. It also requires critical thinking to draw your own meaning and parallels.
I'm annoyed with people ragging on this movie simply because they don't understand the genre.