We cannot really turn into our parent; only into our own imagined image of our parent. Yes, we learn good/bad behaviors from our parents about all subjects as we are growing up, even about being a parent. But behaviors are just behaviors; they're not "us"/who we are and they can be changed if we want.

I did not have children, a minor part of that being because my stepmother was an angry parent and I turned into an angry young adult and was afraid I'd be an abusive parent. But I resolved most of my anger in therapy and am doing fine learning to be a good grandparent to my stepson's children.