Excellent movies

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And while I'm watching movie it's very opposite, it's like Star Wars. It's a total fantasy with no seriousness, it's just a tale for children.

Have you even seen Empire? Even if we're only talking about the first movie, how can you possibly say it is only for kids (I'll give you Phantom Menace, though, and maybe the other prequels?) I'm sorry, but I don't understand your description of Lord of the Rings as a "fantasy with no seriousness."

It's just not so complex as the book. This is no bad. But the feelings I get while reading the book and watching the movie are totally different. The level of satisfaction is different. And that's the answer "why" I think that the movie is not a masterpiece.

At worst it is a bad adaptation then. Don't compromises always have to be made when adapting a book, especially a 1000-page book, to film? You can't fit everything that's in the book (I haven't read it so I'm assuming here) into a movie or even three because it will be unbearably long. The films mainly focus on the main narrative which to my understanding is not essentially different from the books. It's not really an answer as to why it is a bad movie. The source material is completely irrelevant.