In an adaptation from print to screen you lose some motivations, but preserve what you can through acting and convert some of the internal monologue to dialogue. It's not 1:1, but it shouldn't be, otherwise season 1 of Game of Thrones would be 100 hours long and entire episodes would be dedicated to Ned Stark sitting at a tree thinking about things. It's all important, but it's not right for the medium.
Anime adaptations of manga are a bit different, of course, since you essentially have amazing storyboarding handed to you and can often just fill in some of the spaces between panels and be good to go, but here, the narrator needed to be axed or minimized, the internal monologues needed streamlining, and the fight should have flowed instead of skipping forward multiple times straight to
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