It's pretty garbage. Here's my list:

• First off, the way they tease the Quidditch World Cup is just plain mean. I understand time constraints but c'mon.

• The "fight" with the dragon - waste of time! No one wanted to see that, it doesn't even make sense.

• no S.P.E.W subplot/winky subplot

• no Percy subplot

• Harry is consistently an asshole through the whole movie, especially to Neville before the second task

• Crouch Jr's tongue tic is just plain stupid

• Dumbledore acts like a douche pretty much the whole movie

Redeeming factors to me (there aren't many)

• David Tennant is a good actor

• Comedic relief at certain points, like Filch with his poorly timed cannon shots

• Rita Skeeter is as annoying in the movie as she is in the book

So yeah, I honestly think it's the worst out of the 8 movies. PoA is pretty terrible as well though.