One of the most tragic things I know about human nature is that all of us tend to put off living. We are all dreaming of some magical rose garden over the horizon instead of enjoying the roses that are blooming outside our windows today.
Screaming at children over their grades especially to the point of the child's tears is child abuse pure and simple. It's not funny and it's not good parenting. It is a crushing scarring disastrous experience for the child. It isn't the least bit funny.