I don't like to dwell on the past but for this to make sense I'll provide a bit of context.
My parents split when I was about 3 and my father had some bitterness my mother left him.
He viewed my older brother as 'his child' and me as 'his ex's child' so he was distant/insensitive to me as proxy for feelings he had to my mother.
In this channel my father explains his actions and the new understanding he has