You can consider it as a scam if it did something that is against the law or that is really inappropriate for instance you just won a big amount of money and they will do anything to delay it or in case won't allow you to withdraw and you submitted the required document but still, they did not accept it even though you know that what you have send is valid and doesn't have any problem.
I think you should away on those kind of gambling site.
Even though the ops stated clearly that he didn't know that the casino will ask for kyc but after he won an amount that is above many casino trence hold for kyc demand, because most of the casino may allow you to withdraw any amount that is below $5k but any winning above that limit will trigger kyc demand and the player will need to go through kyc verifications.
But in a situation where the player passed all the verification process and the casino refused to grant him access to the fund then he can call the scam.
Casino sites may require kyc to withdraw large amounts which almost all sites require. But all sites must write this into their rules. op said in his post that he is willing to do kyc but he submitted kyc but his kyc is not getting approved. If the site is repeatedly rejected by kyc despite submitting the correct information, then the site must be trying to cheat, so the site can be called a scam. But op has not posted any proper proof that his kyc was rejected after submitting kyc
Maybe we better think that @OP has forgotten it even though he has re-sent KYC. He doesn't need to play there if the casino is proven to be a scam casino. But if the KYC is refused, there should be info from the casino about what to do and the casino shouldn't be too complicated for players who want to do KYC and agree to it immediately. If refused, this adds to the suspicion that the casino is really a scam. Or maybe in this case, there is a misunderstanding between @OP and the casino so the problem cannot be resolved.
Exactly if the ops pass the KYC but are refused by the casino without any explanation or note to state what part of the document was not accepted that is a clear violation and a scam act from the casino, just as I said in the previous comment, we must read through a casino T&C to be sure of what term and conditions we are up against before making an account.
Also, check the online reviews and also take note of that casino that has an ANN thread here in the forum before playing on them.
What I think about this is the Following, if a player complies with his KYC he must give all the priorities and facilities in the casino, it does not Make sense that he can back out his Process or have it repeated again, with the simple the fact of agreeing to do it and doing it is a profit for the casino and it is one more customer that does not leave, so why not Value that? If they Show up that Complies with the kyc and then they don't Comply with their deal, the casino is a Scam ,Because they will Suspend the Withdrawal and Nothing can be done.