Book or Movie Ending Disappointments

[Audio the obscure]

Thought I'd start a thread on sharing books/movies you've read/watched that the ending disappointed you in some way. Then, if you like, you can share why you were disappointed. 

Books (the two I've listed here were made into a movie):

"Of Mice and Men" - I was disappointed that Lenny died in the end. Was hoping he and George would make that dream of theirs come true.

"Flowers for Algernon" - (movie called "Charly" - 1968) - that Charley Gordon wasn't able to retain his increased intelligence.

Movies:

"Rain Man" - that Raymond ended up going back to the institution at movie's end instead of continuing to stay with his brother. 

Puppet Master 6 (Curse of) - ending really sucked - so predictable . 

[Outcast]

Romeo and Juliet (1968) - that they both died in the end. I was still young when i watched the movie and didn't know about the story at the time. So i was really rooting for them to get together.

[StarFall]

I was incredibly disappointed by the end of the Sookie Stackhouse book series. The series was known on TV as True Blood but I never got very far in the TV series so I don't know how that ended. However, I did read all the books and I feel the author got very lazy by the end and also failed to care about or understand her fans' reasons for continuing to read. The last book felt like a very big F*** You to the fans.