I wasn't any good at school (obviously). I daydreamed my way through, never fitting in. Neither clever nor naughty enough to be noticed.
My older brother was very clever and good at school. Schools would thank my parents for sending him there, and would predict him doing great things when he grew up. He passed exams, went on to higher education and university, at a time when grants were still available, otherwise my parents would not have been able to afford to send him, and he now has a high status, high paid job and is happy.
My mum was clever and good at school.
My ds is 12 and seems very similar to me. Really not engaged or interested in school. Trying to get him to try harder and do his homework, and put any effort in at all. He couldn't care less.
So do you think with school, you've either got it or you haven't? If you're going to be good at school, then you will be naturally. If you're not good at school, no amount of trying is going to get you any better? I guess we can't all be good at school. I don't know.