In the 5th book (Order of the Phoenix), why is Harry Potter so extremely angry?
Is his anger natural? consistent with the teenagers of his age? Or, is his anger pathological, i.e., a sign of emotional and mental distress such as a post-traumatic stress syndrome (PTSD) of some sort? Or, is his anger totally circumstantial, given his unique previous history and a direct result due to the pressure of his day-to-day experiences? Or, is his anger simply unfounded, misguided and created by himself, overblown more than it ought to be?
Why does Harry Potter take an extremely irritable and snappy attitude with not only the Dursleys, but even with Ron, Hermione, Sirius and Dumbledore? Why does he think his two best friends have snubbed him, and not accept the fact that both of them were ordered to write detailed letters by Dumbledore? Why is he so angry with Dumbledore and feels that Dumbledore is slighting him and ignoring him? Why does he regard taking Occlumency lessons as a punishment, rather than a necessity? Why does he have to fling things and break stuff in Dumbledore's office, even though it's his fault that Sirius is killed?
From a literary point-of-view, Is Harry Potter's anger representation an accurate portrayal of a person whose found himself in his particular situation?