What is the conncction between child abuse and social isolation ?

give me please some examplles and facts thanks ,What is the conncction between child abuse and social isolation ?
when a child is abused they learn that they are not good enough for their parents, guardians, heroes. it doesn't go away once they are out of the situation it manifests itself in their social relations as adults. you don't believe you were good enough for your parents, how could you be good enough for anyone else so you just don't go around people because rejection is painful so it's best to avoid the sourceWhat is the conncction between child abuse and social isolation ?
They learn that they are completely disposable.