The Movie is Never as Good as the Book
I reread The Lord of the Rings with the Hobbit and the Appendices every few years, and am currently at about twenty times through it all, since I first came across it in 1972.
On the other hand, I have watched each movie once only, and don't really expect to again. This clip illustrates a few of the reasons why.
https://youtu.be/SQkygZdZ_Vk