What’s the issue with providing KYC, what are you hiding.
There must be 4 or 5 exchanges that have my full KYC, bank statements, selfie photo, home address, mobile number. I don’t understand your problem, if you need to provide KYC to withdraw funds then do it.
Many people do not want to do KYC because:
1. They might have not necessary documents
2. They think personal information might be compromised
3. using multiple accounts
4. Mislead something etc.
But for this user I think nothing happen just lost on bet and behaving like a child.