My father, who convinced me (16 m) at the time to move in with him instead of my mother when they moved. All 3 of the other siblings stayed with my mother. He then kicked me out the week I turned 18, a week into my senior year. Since then he stays in touch only to speak with his grandchildren (now going on 4 kids). I have never been anything but opportunistic and positive in our interactions. Regardless he still acts like I am a burden to talk too. Am now 37, and finally getting to the point I should accept it. I’m the complete opposite with my own children and can’t comprehend how someone could treat their child like this. How do I cope? It eats at me. I will answer any questions in depth if it will help in understanding the situation.
Stop letting him. You don’t owe him even an explanation. The nicest thing you could do for him would be to let him figure it out with as much time as he needs to do so. He hasn’t listened thus far or had any appreciable or effective consequences that gave pause to or caused change in his behaviors. I think you probably know this and are just looking for confirmation.
Take yourself and your family back. Why let someone like that be a further influence?