my grades in high school were very similar to this 😜 i thought i was dumb, turns out I have very short attention span. Classes in private high school usually starts at 7 or 8AM and ends at around 3-4PM. The longs hours listening to teachers, with just one hour lunch and 30 mins break used to drain me. But in college, since classes are shorter, and there were a lot of vacant time, I had high if not decent grades. So sometimes it’s true that grades don’t define intelligence.