So I've got the highest average grade in computer in my level. Yet just because I haven't represented the school, I couldn't receive the "Best in Computer" award

Looking at your tags, I guess you have learnt a lesson for life. That's school at its best.

Don't let school deprive you of a good education. Its largely worthless until late college, if you go to a decent one.

Teach yourself; you'll learn much more, and more quickly.

Ah, I remember I had the highest marks in Computers in my school but since it was "only" 99/100 rather than 100/100 I didn't get a particular award given to people who get full marks.
All the other subject toppers got that award because they got 100/100 so I was the only subject topper without that award.

🤷‍♂️

See that might seem like an annoyance but it sounds (and feels) so trivial now. It's been like 5 years and I'd forgotten about it till I saw this post. You stop caring pretty fast as you move ahead.

Like @Root said, don't let school deprive you of a good education.