You need a reality check, dude. The fact that you think you can judge people’s children better than their parents based on a few sentences on HN lays bare your poor assumptions.
The few sentences you provided are highly correlated with very successful students. Learning Latin in 5th grade is not something 90% of children do. Immediately your kid stands apart for having done that. Same with sports and music. Combine that with good grades, and that's the profile of a top student. What more do you want? Again, what's your conception of a top student, and how do your kids not qualify? Is it because they're not getting straight A's?
Still so wild to me that you, as a father, are arguing post after post to me, a dog on the internet, that your kids are below average. I mean, regardless of what reality I live in, what's up with that? Who are you really trying to convince here?