Check the FAQ page for more info about the KYC related information.
In short, KYC is mandatory once your total withdrawal amount exceed € 2,000
The main problem of KYC is not about how long the process but it is about privacy.
There are still many people who want to gamble anonymously so KYC is something to avoid.
Although I think that KYC will be something mandatory in the future due to some reasons such as regulation, license, or something else but as for now where there are still many crypto casinos without KYC, then these non KYC casinos will be still the preferable one.