"Your grades have been going down!"

he exclaimed with annoyance, while showing the report card to his teenage son

"You were more efficient before! Now you're just lazy!

He yelled and insulted you, when he was upset he used to be very harsh with his son. This occasion was one of those times, but there was something he had never said and it shook his son: "I'm ashamed to have you as a son! You're not my son, just a loser!" I shouted angrily, throwing the grade sheet in his face