Too many people do not consider house edge. 1.91/1.91 is a 4.5% house edge. 1.95/1.95 is a 2.5% house edge.
KYC by these basically unregulated casinos run in Curaçao, which I guarantee involve themselves in money laundering the profits out of Curaçao, is their way of delaying payouts. When you say “oh send us your documents” and hold someone’s withdrawal for several days, many degenerates will continue to gamble and lose it all. Casinos do not give a care about who you are EXCEPT when they can 1) keep your winnings or 2) encourage you to keep gambling.
Most of the online casino has this house edge (1%-5%) and I think that is reasonable enough.
I think it is natural that there is an anti-fraud policy on each gambling that we should be careful always and it is always adviseable to read the C&S before proceeding to use the casino. KYC is very common especially if the casino has been licensed, so they are required to verify those large transactions and you mentioned above the amount that you wanted to place a bet and gamble which is a big amount.
Have you tried this casino(
https://owl.games/sports)? aside from Sportsbet.io which seems they are both the same good casino for me.