Grow up. Stay out of your parents business and learn to appreciate what you have.
It sounds like you think you have been treated unfairly. Perhaps you have.
I had a mother with a cruel streak. My dad really didn't know what to do to protect me from that.
At no time in my life however, did I ever regret that I had been born---and I turn 72 next month.
Mine was worse!
There on the same team.