I'm sorry to say this, I don't mean to disrespect at all, but don't you think you just gave up too early? Being able to play competitively from a young age, being able to practice properly, and being able to play at a level that can push you further, you had opportunities, and great ones at that. Maybe if you just pushed a little bit further, and maybe if you played it longer, if you didn't give up a bit too early, who knows what could've happened
As for the mental side, I have a classmate that basically sleeps on 90% of his classes, the other 10% he doesn't because the teachers are stricter and he gets reprimanded. But he's one of the honor rolls and has grades equivalent to straight As. While talent might be a factor here because of how his brain is wired, the more amazing thing he can do is how good he is at handling this talent. He knows he's an auditory learner; the tests say so, and thinks so as well. So what he did is he learned this sleeping thing where he's no actually asleep, but just half asleep where he can still hear what's going on around him. So literally, while asleep, he can listen to the teachers
It doesn't stop there either. Whenever he studies for tests he'd always create mnemonics at every chance he could. And he gets creative with it. Within an hour or two of studying he'd already be ready for the test. And I think that's what makes him amazing- the way he's able to be efficient at what he has