1) What problems have you recently encountered regarding online gambling? (or what have you disliked recently?)
Casinos asking for more documents to verify after a win. When casinos use the right to ask for extra verification documents to inquire about some information I don't want to expose, it becomes very annoying. I prefer the casino to state all the documents they require in the terms of service instead of coming up with more KYC verification after a win.
2) How would you solve this problem?
Thanks for every response!

At this time you have to provide all the documents they have since your money is at stake. The next move will be to boycott such casino to avoid privacy invasion. It is better to bet with a reputable casino than to be attracted to some of them maybe because of enticing bonuses.