It has always been and will always be that each and every human being is, at heart, a spoiled brat.
People who grow up did nothing to earn it, so it’s nothing to be proud or ashamed of: it just sort of happens.
Some people never grow up.
If you’re one of the poor bastards stuck with growing up, you’ll learn to like it.
If you’re one of the poor bastards stuck with growing up, there’s nothing you can do to stop it.