Knives122, the movie had no depth, no . . . story. It was just random parts of the book put together to make an hour and a half movie. Not only did they leave out to many important parts, but they also changed to much.
Also, Harry Potter is for kids 13 and under. So of course, a couple of the books are gonna be Scooby-Doo-ish. The fact that they actually had someone die was utterly surprising to me, because of the age-range for the books.
Movie 4 was an absolute atroscity, compared to the first three. It's even worse because Harry Potter sucks, in general.