Hello and welcome.
Movie adaptations are tricky to judge.
The first movie, An Unexpected Journey, I'll agree, is probably truest to the source material. Book fan Bunny is pleased.
That first one also takes a really long time to get going, continues to drag until Gollum appears, and my brain hates my eyes for seeing that incarnation of Goblin King. Movie fan Bunny is not pleased.
I'm such a purist. Never finished any of the LOTR books but saw all the movies and liked them, finished the Hobbit but never saw all the movies.
Outside of that, I think directors have an obligation to make the author's vision come to life, not their own vision. I think they should take apart the book - give all the setting descriptions to the set designers, all the outfit descriptions to the costume designers, and not add in scenes that never happened. I don't have issues with deleting scenes or merging them, but I hate it when they differ from the source material.
I have 5 book to film adaptations that I think were as good as or better than the book, but I'm very fussy.