First and foremost, gambling is always depend on luck.
Second, the additional withdrawal fee, the commission odds, the rules e.g. wager amount to force you to gamble more.
Third, you're just not good in sport.
That's why most of bettors always lose, even though many people say it's a skill based game, but it's still not enough to give a higher guarantee the gambler will win and beat the house.
It's true and most important factor the gambler should keep in mind.If they doesn't agree in this fact,then he will do gambling with addiction to taste the luck daily.But the luck is not favor the gamblers all the day.He need to find one game which suit him for long run.Then he must learn the rules of that game completely is most important one.Because rules are most important to get your winning at the early stages.The people with skill of certain game will get some guarantee win with last price and winning is most important by using the skills.