Saw it today with the woman, I liked it, and she's sworn off ever going to another horror movie again, so I suppose that says something (she is 100% serious too, she's just done with the genre, she thought it was a well made movie, but she just doesn't enjoy wanting to scream for 2 hour straight, haha).
I think my only real complain was with the bully side story aspect. Why was that needed at all? I felt like the whole movie would have been better off without any of that stuff, because A.) the kid is a straight up insane person which seems out of place in an otherwise grounded "normal world but with a monster" story, and B.) Ultimately he doesn't matter to the story anyway. I feel like if you ask the question "Would the movie be better if all that bully stuff was cut?" the answer would be yes. Maybe his story sets something up for a future film? I don't really know.
To counter that complaint, I really liked what the film did to every adult. Almost every adult the kids saw seemed odd and false, like they were in layers of prosthetic makeup or something. I guess the exception would be a couple of the really creepy adults, who looked normal, but in an obvious creepy/dangerous way. I haven't read anything into it, but my guess was that the filmmaker wanted the audience to see things from the kids perspective, where adults seem to either be a clear danger, or slightly alien/weird/different in a way that. That's how I took it anyway, but who knows. Was a neat effect no matter what the reasoning was, just one more touch that made everything seem ugly.