If the gambler isn’t responsible for his losses than who is? I think the whole idea of trying to place blame in the first place is a bit misguided. You’re paying for entertainment, so if you are looking to blame someone for you not being happy with your purchase than I guess you could blame the casino for not being entertaining enough, but it would be better to just find a form of entertainment you do enjoy.
Gambling is a game of wins and losses, this is what we all signed up for, we can either win or lose, those are the two possible outcomes. There's a third option and thats a refund, this happens when the casino is at fault and also when there's an error in settling a game you staked on, this is also possible in sports games when you pick an option like over 3 and the teams end up scoring 3 goals. anything asides this there's nothing to blame the casino for