The people reviewing this with bad reviews clearly missed the point. This is a movie based on the book by Rob Doyle. The book was fantastic and portrays the dark side of early adulthood well. It explores themes such as mental illness in a way that is brutally honest. The movie had to cut out some of that and obviously had to find a way to adapt Kearney's hallucinations. Eoin Macken did a great job making a great book into a movie, especially given the resources and the budget he had to work with. This movie had the potential to be better than it was, but it certainly wasn't horrible. If you're just watching for Anya Taylor-Joy, you won't like the movie. She was a part of this project long before she became famous for her roles in Queen's Gambit or Emma. She certainly isn't the only good part of this film. I highly recommend you read the book, as the movie becomes much more comprehensible once you have.