It doesn't always follow that if you have a crap upbringing, you'll become a crap person. My ex had the same privileged upbringing as his three brothers and he was the only one to turn out bad - wasn't treated any differently to them but he still turned out bad. I guess it just happens.
Me and my kid didn't get on until she was about 2 years old, more or less, and there were many factors contributing to this - none of it her fault. But we're cool now and have a great relationship. She's a good kid...something of a rare breed for 8 years old