I think I might have figured out why I'm unsatisfied with my performance in school.

It's true I care too much about what other people think of my grades, that I think that if I have low grades, people think I'm being lazy, or worse, I'm incapable.

But I now see that no one cares about that, and that most of them are preoccupied with their own grades to care about looking at mine (I know that's my case, I don't keep track of particular people's grades.). So I have no reason to worry.

Of course, saying so is easier than doing so.