Is anyone else Disappointed with the Shutter Island Movie?

Now, I read the book and it had way more substance, and a better/well developed story. I saw the movie and half of the things from the book was stripped directly from the movie. There were instances portrayed in the movie that never ever happened in the book. There was no mystery at all. You could see that something was awkward with Teddy/Andrew, they didnt really describe the situation with Laeddis and so on. The book was way more interesting than the movie. Oh and another thing, it made it look like Chuck and Teddy were friends before getting on the ferry. Theres just too much wrong with the movie which made the book waaaay better. well Im disappointed, are you?