Reading the outline is part of the quick scroll that I'm saying. Withdrawal problem tends to happen when you have done something that is against the rules of the casino. One example of this is using VPN, You can do gamble in the casino and possibly win but if you're about to withdraw your funds, The casino will flag your withdrawal and will just say that you didn't comply to their T&C. This commonly happen on most of the casino so we all should be careful with their own rules. One thing why gambler hates the casino that didn't let them withdraw is the secrecy of the casino, I believe that some casino isn't even transparent on the rule that the gambler broke and this will leave questions to the gambler. There's even a history of false accusation on some casinos that's why I also hate casino that don't disclose why they block someone's withdrawal.
Yes, it cannot be denied that there are casinos that are not transparent, but those are casinos that don't have big names, or you could say they are closer to fraud. This is something different, because if we play at a well-known and trusted casino we will find terms and conditions that must be met by users, for example withdrawal conditions. If we want to be safe from irresponsible casinos, then the choice is that we have to play at a trusted casino, that is the best choice.