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.
You won't get justice or change anything about how the guy acts so you have to make changes yourself that you can control. Let yourself be free of needing his approval and attention. You deserve respect at least as much as you'd expect from any other person, being family doesn't absolve them of it. If he won't be respectful, then stop calling him, let his calls go to voice mail, stop seeing him and fill your time with people who are respectful. You can't change him but you don't have to put up with it either.