I don't know if this is all TOW's handiwork or if she just tapped into and magnified what was already there.

She tapped into and magnified what was fermenting in him. It's wasn't clear pre Me-gain, as the Palace did a lot of work. as did his family, to shield and protect him. His stupidity (Nazi uniform, naked high jinks in Vegas etc) was covered up and passed off as him blowing off steam or making a simple mistake. If you look back in hindsight it all there to see. Harry was and is a mess and sad to say Humpty Dumpty can't be put back together again.