What are the things your parents did that you will never do to your kids or future kids?

Looking back i was beaten by my father to the point where i couldn't sit, punched in the face till i bled, i still have the phyiscal scars, told i wasn't his son and criticised on everything i do. I made a promise to never hit my children or make them feel like that EVER. I noticed my father is a narcissist at a young age so i just keep away from him as much as possible.