To all of those unhappy with the book to movie situation, you'll live. Period. However, I do have some friendly advice for you, to perhaps makes this a little easier; don't see it in the same universe as the books. Also, don't see it as a literal adaption from book to movie, it's not.
I know people resist this idea, but just think about it. If you put the book out of your head, and watch the movie as if you've never heard of it before, it won't be as muddled by your thoughts of the book. It's not easy, hell no, you'll be sitting there comparing it, no matter what happens. However, once it's over, if you say to yourself; not bad for a movie, not as good as the story the book told, but not bad; it'll be easier not to get butt-hurt over.
Before you say 'but it was based on the book, it should follow it!' No. It does not have to. It is not an adaptation of the book to the screen. No. He was not REQUIRED to follow it perfectly, which gave him the freedom to do what he did. Okay. I'm going to stop here, because this is going to turn into a rant, and I want this to stay friendly.
tl;dr:
- split the books and movies into different universes. Don't even put them on the same level. (every book made movie I've been with, this has worked for me.)
- remember, he wasn't required to follow the book to the letter. Hell, he just had to have only a few of the things the same.
-Be polite to one another, some people enjoyed it, others didn't.
- Results may vary using this train of thought. It can take effort, but can be done. There are only a few things that have been made from book to movie that are unforgivable, and The Hobbit wasn't one of them unless you let it be. At least the story told made mostly sense.
Please don't b***h at me about this. I don't want to argue, I was just offering a way to make your 'pain' seem bearable. Generally, all things I see as argument starting worthy, are gonna be ignored by me. Have a great day!