If you quit that's when you lose is the loser mentality, in my opinion. So many gamblers have lost life savings before on gambling to chase losses and that is how they thought about quitting gambling.
If you are a gambler and you are always chasing your lose, then you are going to keep on losing, we all should learn to accept our lose and come back another day to fight. When you chasing your losses, you won’t want to give up because you will be having the mindset that you are going to win back everything’s you have lost, but don’t be surprise that you will end up losing everything you are having left with you, just because you are chasing your lost. If you are a gambler and you have lost enough of money in a day, then just stop gambling that day and wait for another day before you will continue.
Gambling is all about the fun and nothing else, so forget this point of view and don't chase losses.
The main issue is that people don’t focus on the fun aspect of gambling, what they focus on is just the money aspect that’s why they are always having issue when they are losing, they are always feeling they will win back all the money they have lost if they continue playing.