A childs upbringing shapes how they deal with things, how they react to things, how they view people and the world around them.
A person is who they are because of their parents because of their social surroundings when growing up.
I have borderline personality disorder caused by my upbringing it is caused by events in a childs life and changes their personality to what it might have been if they had been brought up differently to what it turns out to be.
I am 46 I have the emotional maturity of an 18 year old because my emotional side was stunted by my parents inability to love, to nuture, to be proper parents.
Your thread title is offensive.
I don't choose to have failed relationships because of the way I behave I have them because of my personality and the downfall and irresponsibleness of my parents.
My life has been shit becuase of my upbringing.
It shapes us it forms us into adults.
It is fucking hard to change a personality, ever tried it? No I bet you havent. It would take 18 months intensive therapy to make a dent in the damage my parents done, I had to choose a job to live or therapy. I chose the job. The future I now have before me means it will be alone. Thanks parents.
Before you asked the question do some research, start with psychology, the basic stuff will suffice.