Yes, his relationship with William is not a normal brotherly one due to the Royal Family aspect, and I think there’s aspects of perceived morality involved when wanting to leave (how could you do that to your brother, the queen, the country blah blah), that’s somewhat married man like, and to be able to leave that he had to make them worse than him in order to not feel crushing guilt, giving himself the permission. And the way to do that - make them terrible, the past was awful, it was never good, etc etc
I respect him for leaving but the manner in which it’s happened is regrettable.