cringy and i could smell the plot twist miles away

I did, but it doesn't take a lot to frighten me when it comes to movies.

Did anyone actually find this scary ?

Nope

I thought all the time that the real grandparents were still alive and lived through a daily torture in the cellar plus that the poo the boy has discovered is from his real grandfather.

I wasn't scared at all. Felt a bit like a dark comedy. Also the name POP POP was getting on my freakin nerves.

watched it in cinema when it came out... Yes, it was scary and it did freak the crowd out...

it works.

If you watch it on your ipad, or in your living room while pausing to go to the bathroom, or to make a sandwich, then it's probably going to lose some of it's effect...