All and every person comes into the world with a sense of self value/self worth, actually everyone and each one believes they are worthy and valuable, but when world(other people around) showcases to them over n over they are not, you start to shut it down, start to give up to feel it cause what the point if no one thinks it's the case.
Your worth that gets decided by world is dependent on how you can give, maybe you greet evryone and are socially good so people like you, or you are ranked figure, or it always comes down to how you come of use to people either through work, feelings, entertainment, service, show that you can get great grades.
Why am I trying to stop the world from showing me it dislikes me, it doesn't choose me, the very fact that i try to stop it, shows that I already believe/know that it doesn't like me.