The list of things book readers hate about the Harry Potter movies is as long as the list of school supplies for a first-year student at Hogwarts. Although the films were generally well-received, the Harry Potter books inspired an intense fandom, and that’s ensured a certain amount of snobbery when it comes to changes made in the course of adaptation. What Harry Potter purists hate the most about the movies are the innumerable small changes, omissions, and embellishments that seem completely unnecessary to those who feel the original versions are perfect.
There doesn’t seem to be any particular film that draws more ire from Harry Potter purists, with all the movies in the series earning their fair share of criticism. Instead, fans seem to take umbrage (no pun intended) with the consistent differences that writers, directors, and actors chose to make for the sake of adaptation. To a dedicated book reader, these changes stand out like a troll in the dungeon.