Yes, chess is a part of my personal identity.
No, I do not attach my self worth to chess.
There are many things I consider parts of my personal identity. Chess is just one of many. If chess is "cursing [you] in this way" then I'm guessing it is partly because of how much time and effort you've invested into your chess. Wonderful! Attaching identity to someone you invest a lot into a love if a good thing, but I wouldn't call it a "curse" and it also isn't healthy to attach your self worth to a board game.
How long have you been playing chess if you don't mind me asking? People don't typically attach their entire self worth to something they started 2 weeks ago, so I imagine you've played chess for a long time before creating this chess.com account.
Why do, so many of us attach chess to our self worth? No other game has cursed me in this way..