6? Really?
I was far below average from the moment I started school to the age of about 9/10. My Grandmother likes to remind me that they tested me for “learning difficulties” but it turns out I was “just lazy”. Sigh. Anyway, I grew into myself around the end of primary school. Became and stayed an A-grade student through secondary school, went to a great university, earn very well now. And now I spend my entire life convinced everyone will realise I’m a lazy, useless idiot because that’s what everyone said I was (not to me, but about me) until I was 9, so maybe give your kid a break.
DH didn’t start to excel until 14/15. He was almost expelled from school and was consistently bottom of the class. Then he knuckled down and absolutely aced his A-levels, undergrad and Masters. Again, he earns very well and is by far the most intelligent person I know, but after a childhood of being dismissed as below average, he works himself to the bone. The true definition of an insecure overachiever.
We are successful on paper, but both suffer from depression and anxiety (both medicated), both have chronically low self-esteem, and are both terribly burnt out with no end in sight (hence I’m procrastinating on MN). We both grew up feeling like we needed to earn our parents’ love by simply being better than average.
Moral of the story: prioritise health, happiness and confidence in your child, not some arbitrary measure of “success”. They’ll find their way and they will flourish, it just might not be in the space or way you want it to be. They’re a human being not a show pony.