Losing money is always unpleasant, but I completely agree with you that a responsible gambler should consider and accept the possibility of defeat before the start of the gambling session, rather than foaming at the mouth and proving that the casino is to blame for his loss. I have seen such people many times, and I was really amazed at how deeply convinced they were that they were not to blame for losing all their money. I would not recommend such people to gamble at all, because it is partly because of such people that society has a not very good opinion of gambling.
And if you take note of people that are gambling they are always looking for people to blame so there is no need for them to blame anyone you selected the game your self so it is better to take blame and then try again next time, and when you are gambling you need to be responsible for what ever action you are taking, and we should know that even casino lose money so its a 50/50 thing so you don't need to over worry your self, and if not that they are not serious how would blame casinos for what you used your own hands to played it so you blame your self no body else and they feel its only fun when you are winning and you wont always win.