I've always wanted to confront him for all the shit he has done and never apologised to our mother.
She had 6 of us, since my oldest brother he was abusive both verbally and physically, he was gambling and just generally a real piece of sexist shit that made things only harder for our mum and us.
Now he's been divorced with my mum for about 10 years; he didn't wait even a year before he started dating, he didn't give a dime for us and borrowing money from him was dreadful. He always trashed our mum behind her back and made us hate her as teenagers(I can still see huge amount of disrespect toward my mum from my sister and brothers to this day as a result).
Now he lives his life, moved in with his girlfriend three years ago and visits occasionally like he's a cousin not a father. He hasn't messaged me or tried to contact me since I had my son(he wouldn't ignore completely if I message him tho, he would just sell bullshit).
How do I go about it? How do I make a narcissistic idiot like him get the point without being offensive(he'll just shut off as soon as he sees he's called out no matter if it's true or not)?
How is it ok for him to move on with his life like nothing happened, he's responsible for his children and what he has done. I don't want to let him off the hook.