It's an adaption.

Rating: 7/10 (2 June 2019)

I've always been too harsh on this film, though it doesn't follow the books as accurately as "The Lord of the Rings" Trilogy followed their films and that I would have liked them too, I now think of this film as an adaptation, not an accurate depiction of the book, it makes me like a film that I would otherwise criticise for making things up that were not in the book.
The story lines are questionable in many places but the acting is constantly superb and the casting is spot on.