The only time I think someone can win against the casino is when they newly just got into gambling or they’ve been gambling for a while but don’t gamble with a lot of money so haven’t lost much to the casino and as you said in your post they luckily won a jackpot which gives them back all they have lost plus a very large profits and instantly quit gambling - that’s one way I think a gambler can win against the casino.

But if they continue to gamble, it will get to a time when their losses will cover all their profits and before you know what’s happening they’ll fall back to the losing category.