Gray, a fine balance between Light and Dark

Fifth year just ended and Harry has had enough. Dumbledore is not to be trusted and since his friends idolize him who knows if they are trustworthy? Locked up in Privet Drive, fed up with the Headmaster and grieving from the events of the DoM and the death of Sirius, Harry decides to rebel. How is that going to unfold? Gray!Harry, Powerful!Harry, Dumbledore!Bashing.