A no-KYC crypto casino should be the best judging by the nature of cryptocurrency but lack of trust and regulation have tied their hands. Even at that, they have excesses under the guise of KYC, which is why it's good to look for the ones you can only trust.
They are bound to comply with the regulation that if the government asks for the client's data, they might just give it as well. I don't think there is a casino that you can trust but as long as you play and withdraw minimal funds, you could just skip the KYC requirements.
There are however casinos that ask KYC regardless of how small the funds you are about to withdraw, I tried this from one casino which still asks even if the funds I got were just $70 worth of Doge. Never bother to withdraw it but play the risk of putting it all to the underdog by KO.
If a casino has a license and didn't declare that they won't collect KYC, don't be unconcerned about KYC since they still has a chance that they will collect it from you. It is the experience of the majority of low bankroll gamblers but don't assume that it will also happen to you because we don't know what is the real criteria of casinos.