You created an account on Duelbits with the intention to gamble and they gave you what you wanted. You gambled and lost and now you are trying to throw dirt at the casino for providing the service you signed up for. I am sorry, but that's not how this works. If you are a grown-up then act like one. Asking you for KYC wouldn't have solved anything. You could easily create a second and third account or register at a different online casino.

Duelbits doesn't owe you the money you willingly lost just like you wouldn't be required to give it back if you had won it fairly.
If you have a gambling problem, seek professional help. Talk to a professional health worker or check yourself in to an institution. Don't look for the next casino to gamble and complain how it didn't go according to plan.