I honestly think that it's pointless to debate about what is or is not shame at the moment. I understand your feelings, bacase I would be quite mad too, still the princip remains the same. Casino must be sure about your deposits, identity, payment method. Try to provide all exactly the way you awas asked to do so, this is the easiest way.
Mr. Bet is a casino with a perfect reputation and they take the KYC very seriously. If I was about to guess, I'd say that maybe they found some similarities with other accounts, so they ask for additional documents. It happens very often.
This requirement is also quite normal:"Please provide a photo (screenshot) from your wallet dashboard or a bank statement, clearly showing your name and deposits to our website. Make sure the name matches the data in the provided Proof of Identity."
I would not waste my time asking questions, insted I would do my best to pass the KYC and be done with that. I guess I would also ask the casino whether I should expect the same procedure nest time I'd like to withdraw.
By the way, this is why the cryptocurencies are so popular when it comes to easy withdrawals.
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