A scam casino remains a scam regardless of whether it requires kyc or not, if you don't pass the kyc or don't get the signup bonus it doesn't necessarily mean it's a scam but maybe it's better to look elsewhere
It is obvious that just because someone can't verify their KYC with a platform, it shouldn't be considered a scam. A lot of times, users' KYC applications are rejected for a lot of reasons, mainly because the documents submitted are not clear and aren't readable, or maybe personal details provided don't match with what's written on the documents, and many other reasons could cause this to happen.
As OP said, they didn't specifically refused to pay the money but they rejected the KYC verification and they didn't even ask the support team about the reason or retried, maybe if they did that, they would assist them with it and the verification could get completed.
Deviation from KYC verification and recognition of the player’s documents as unsuitable for verifying his identity by the casino in case of a player’s request to withdraw a large winnings to his account and persistent confirmation from the casino that the documents are fake, although the player himself knows very well that the documents are real. In this case, I think that such a casino is fraudulent. By the way, for the final confirmation of identity, you can use video communications and a small survey of a person, players, and this is now generally very simple.
So the issue with KYC can almost always be resolved.
And the casino's nit-picking about documents when a clearly conscientious player passes KYC are signs of abuse and even fraud. It is clear that all large and well-known casinos do not do this.