How do I show a character going from being unhinged as he gets desperate to heal and isolate himself from his trauma (yes, this happens) to actually healing from it?
My story features people who are gifted this responsibility to look after the welfare of humans and are provided with the powers, too. These self-proclaimed demigods have a leader, a king, who desires an heir who is superior to him. He has multiple children, of whom only two survive. The older boy has already developed his powers (he’s kind of useless to him) so his father tries to be more psychologically abusive to him. All the anger the father had accumulated from the other children who fled is unleashed on the youngest in the form of physical abuse. The youngest- after a month of planning- decides to leave. Note that in my story, I want to portray the fact that this boy has the capacity to outlive his trauma. The older one feels betrayed and abandoned, and they have a huge fight, and the younger one leaves.
Now in the present, both the brothers (adults) and another character come together for various reasons (they have different goals and the same enemies.) The arrival of his older brother causes the younger one to slowly revert back to his trauma (sorry if it sounds weird) and note that he had made a lot of progress on his own. His condition gets worse with every chapter. That is until he leaves for a while, and when he comes back, he is somehow better than ever. He even decides to help his older brother come out of the past and live.
Now the problem is, isn’t it sacrilegious to portray a character magically healing from some awful things in a few weeks on his own? How do I portray the more psychological aspect of him deciding to and being able to heal without it sounding impossible?
I’ll give more info if required.