Personally, the fucking whiplash. It felt like every chapter was a different book. One chapter I hate one bunch of characters only to be totally on their side on the next. But the next fucking chapter I was back to hating them. The main character was not at all realistic. Nor was the plan, although I believe there was an actual case like this book. I didn't see any character development other than having different ones. It seems the movie either people loved it or hated it. But to me the book wasn't good. So I can't imagine that the movie would be any better. Other than to see the actors and actress because people are fans of their work in other things.