It's not the first time we have seen these type of people who can't handle their loss and start blaming casino for their own mistakes but you see in the end they gain nothing out of it as @Hhampuz already cleared it above as this is one of those fake accusations.
Incidents like this are commonplace but also stupid, because you don't accept defeat and especially those who receive big losses don't realize that losing a bet is already a risk for gamblers and most of those who are like that are novice gamblers.
it's actually their own fault when they play because they play with emotions and not control themselves and the stupidest thing is not to use the money they can afford to lose. And only a stupid gambler makes his own mistakes and accuses the wrong casino without solid proof.