But unfortunately, there are many people who come to gambling places with one goal, namely to win somehow. And when reality says otherwise, they aren't ready to accept it. Instead of stopping, they keep coming back even with revenge missions which will usually make them worse off.
Usually this type of people does not accept loses, they believe they have a chance until they realize that they loss everything and give up, in the end, instead of blaming their lack of discipline, they will blame gambling for their misfortune.