I guess they don't read ToS or FAQ before they have problems with their accounts like suspension, lock, ban, can not withdraw their money. Like some people store their cryptocurrency on centralized exchanges and consider their accounts are like non custodial wallets and completely safe. They don't follow those exchange blogs, Twitters and don't know about policy changes like new requirement on KYC. At the end, when their account is restricted, they complained.
I think it is very similar with gamblers on gambling sites as most of them don't read ToS and FAQ. I don't too honestly but I will search with some key words to find information, rules about important terms which can affect my account and my money.
That's the problem with most of gamblers that they don't follow the T&C and then say the casino haven't told them earlier while everything is mentioned in their conditions which we have accepted.The KYC is now becoming common and you don't need to be updated through twitter about it as one simple search for particular casino would give you all details about them.So make sure you have all things clear beforehand.