Russell Hainline’s review published on Letterboxd:
the book's prose captured a lot of pitch-black humor in the horrible things happening to these people. there's a definite Martin McDonagh vibe to the book, which probably explains why I loved it so much.
the movie removes nearly all of that humor, leaving us instead with deathly serious nihilism and an "isn't this disturbing?" vibe. as a loose comparison, imagine taking IN BRUGES and removing all of the jokes. it's about the worst decision you can make.
so yeah. pretty terrible stuff. and making matters worse, Holland simply doesn't have the gravitas yet to pull this sort of thing off. guys like Robert Pattinson and Sebastian Stan are selling as hard as they can, aggressively chewing scenery, and Holland can't find the right notes to play to get on their level.