Many reviewers mention a "slow burn". Some felt the middle section meandered through repetitive monastery routines, though others found this immersive.
“It can be a bit repetitive during the set-up and development but it pays off with a cool ending, nice visuals, and a bleak atmosphere.” IMDb Hellhole (2022) [720p] [WEBRip] [YTS.MX]
Critics from Decider note the film "oozes with horror movie atmosphere" and creeping dread. The cinematography uses heavy fog and blue filters to create a bleak, realistic look. Many reviewers mention a "slow burn"