I guess I have seen disputes/complain against all the crypto casinos out there. Every day, in the scam accusation section, we have to new accusation thread against casinos. It even includes all the reputed casinos, new casinos. I mean none has an exception. I can't remember if there is a casino that never receive any accusation here in the scam accusation board; maybe betbtc.co is an exception which is closed now. Did you find these ridiculous? Did not a casino run properly? I believe there are issues from the side of the gamblers as well but you can't deny that casinos take advantage a lot of times.
I think every website that involves betting or service will always contain unresolved conflicts that contain isolated cases. That is the problem when you run this kind of business especially in an online setting- there would be issues that involve payments, regulations, or restrictions that could either make or break your gambling website.
As far as I know, every gambling website had their fair share of troubles in the past since these things happen frequently. When you deal with business that involve money, expect that someone would either exploit the system or tell the truth- the fine line that could depend on how you approach such issue.