It's one of my favorite recent (say, >=2013) movies actually, perhaps even my favorite.
I would ask why you call it a 'horror' but I suppose opinions just differ and there might be a great many things one could list about it being bad. Instead, I would like to know why do you say it scares you that it received awards. Like, would you rather contentless movies like Divergent or The Hunger Games got all the awards?