Grandmaster born or made?

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I try much but my rating is still 1503 at age 14 can I get better? if grandmaster are made then why we can't be better? We try much but we are still at under 2000elo. can we better or not?
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Please help

Fetoxo
At the age of 14, 1503. Ok, that is not bad, but most grandmasters get 2000+ at that age. But you can still do it!
ChessMasteryOfficial

Learn and apply the most important principles of chess. - (core of my teaching)
Always blunder-check your moves.
Solve tactics in the right way.
Analyze your games.
Study games of strong players.
Learn how to be more psychologically resilient.
Work on your time management skills.
Get a coach if you can.