and it's a Vicious Vicious Cycle

Not everyone is raised well ,and not all parents know how to parent ..
So if one or both of the parents are abusive (and abuse has many forms not only physical , it's also verbal ,emotional withdrawl, too much control , neglect ,over protection, and not knowing how to parent) and usually the parent/s is over controlling , narcissistic , very strong , has mental /psychological illness etc , then most likely the child would do /be the same when he grows up and becomes a parent and his kids the same with thier kids and thier kids with thier kids and etc . , unless there is extensive therapy ...then maybe things will be better .