Fight Club. It wasn’t fun to read it felt like the author was ploying with me trying purposefully to confuse me to a point where it forced me to become disinterested. However with the movie i was captivated every second. The book’s attempt to obscure and mystify the reader might have been an intentional stylistic choice, but for me, it didn’t translate well.
Not a big-name film, but the adaptation of Disobedience is certainly superior to the very average novel that its source material, and unusually, much more subtle, making changes that are a significant improvement.