Hmm... what went wrong? Let's figure it out with your teacher so you'll do better next time.
"what went wrong?"
When will I have done enough? And why does he feel this way?
"do better next time"
When I do well, you always describe how I can do better. Why is it so hard for you to give gratification?
When I was a kid, my parents demanded perfection. Since that is was how I group up, I never reevaluated these beliefs. I'm sorry.
There was once upon a father whose standards could not be higher....
...perfection was expected, and it got to Marco's head...
...after years of feeling ashamed, he discussed with his father how he felt, and why his father's comments hurt, also understanding his father's point of view...