Oh man, that thing happens with all gamblers because the greed is a very powerful emotions that make us to suffer a lot in life. Most of the gamblers does the same thing when they fall into the trap of the greed because their logical mind will stop functioning when it falls into the control of the greed. If you had control over your greed then you would never lose anything at all.
The thing that prevented me from winning big was also greed because that emotions is very powerful that having control over it mostly in gambling is close to impossible. I also made many mistakes in gambling due to my greed, and some of those mistakes caused me huge losses as a result.
Obviously someone will suffer in gambling when they put too much greed and can't control their emotions. The average person will be in the greed stage when they are dissatisfied with the victory they get and they will continue to feel that no matter how much they win, it is still less than what they expected. Actually everyone (gambler) will have different wins and in the end it all comes back to each other, if indeed they have certain limits or are able to control their passions then it is a fact that they will not suffer too much in defeat. Gamble responsibly and don't be too ambitious about a win because in fact gambling is just luck. This means that whatever method you gamble, it will not affect the chances of winning if you are not lucky.