This is a tad bit insensitive. I have excelled at public school for the first years, then there was a rough patch in life caused by parents which TANKED my grades and social life for years.

I recovered and eventually got an excellent Master's degree in Bioinformatics but it is condescending to assume that everyone was dealt the same hand as you in life and that anything at all is fair.

Maybe schoolwork isn't so easy if you're being abused by a parent once a week?

I had some serious incidents in High School, mostly with other kids, and while my grades dropped, I never lost the ability to make up for weeks, sometimes months of doing nothing for school in a matter of hours.

Didn't stop me from getting bad grades for those weeks/months and making stupid mistakes like not completing assignments and the like.

It's very easy. It's just that in a depressed/anxious/... state people aren't capable of sustaining even the most basic levels of effort after a while. Frankly, I bet that if it was a lot harder, that would have helped me.