I don't know. I have never played in decentralized casinos, as it is kind of painful. You have to approve the transaction each time you place bets. I don't think real decentralized casinos have anything to do with the KYC system. I am not talking about these casinos. Some other unlicensed small casinos do not ask for KYC, and they operate anonymously. But since they are tiny casinos, they are not popular.
Experience with decentralized exchanges or casinos is always related to more fees in on chain transactions but if people consider that KYC is not what they want, as it is dangerous while their main priority is privacy and anonymity, web3 wallets and decentralized platforms would be their most favorite and even only choices.
Experience and practice with decentralized casinos, web3 casinos will also require interactions through smart contracts. It's dangerous and people must know the importance of revoking smart contract approval and access as well.
https://app.unrekt.net/As for Duckdice, I have seen some scam accusation threads and drama here. But I think most of these are not valid. I saw a reputed member like holydarkness was harrased by these people who created the scam accusation thread against Duckdice.
DuckDice has very bad reputation here. They got big issues in the past, and after very long time, they resolved those cases, then seemed to operate well for several months before they began to have problems with scam accusations again and tend to ignore those cases so again their reputation declines.