Harry Potter and the Order of the Phoenix

TLDR :
Needlessly long.
Main character is a distaster.
Story is buried under boring filler.

Harry's POV is both boring and horrifying. We are stuck with pointless issues for 80% of the book and for the remaining time are witness to Harry's serious anger issues. He's had no character development for ages and is still unable to use his brain or any form of reasoning. He keeps disrespecting his friends and is unable to manage his emotions at 15. He repeatedly depicts violent behaviour that should not be acceptable in a children's or teenager's book series.

Harry is a side character in this whole story. For some reason the author thought best to use only Harry's POV and plague the reader with useless trivialities instead of giving them the meat of the story (war going on? secret organization? better focus on exams and mean teacher).
This book should have been titled “Harry Potter and the Inquisitor”, because that is all it is about.
As in the previous books, we are suddenly woken up from trivialities with a bunch of action we barely understand (wtf prophecy?) only to be spoon-fed the whole plot in a block of monologue.
The worst of the series so far.