Yes very true what you are saying and perhaps of humans are greedy and are not satisfied with the results. When I gamble I also feel the same way, when I lose in gambling I am sure that if I would gamble again and manage to repatriate my bet amount and can even multiply. Maybe if we want to stop gambling on the whole we have to stop and try something else which is related to gambling at all.
Well we can't really remove that as it is already a trait that we all have. So the best thing to do is to not be too hooked to gambling in the first place. If you know for yourself that you have the tendency to be addicted, I think it would be best to make sure that you find ways to avoid gambling. That's just about it. As they say, prevention is a lot better than cure, so if you already have a history becoming too attached to a certain hobby that may affect your personal and family life, then better to not begin with it at all