Everyone who enters in gambling knows the chances (most sites informs you the precise percentage), so, particularly, it's pretty much wrong to cry for a loss in cards, dices or slots... I think poker has the best chance to score because it's a question of skill and technique. I think dice and slots could be intentionaly not fair and sure losses will come.
That is certainly true of my companions, most gambling is something very harmful for us who only have the purpose to seek profits in gambling. There is not a thing we can get in the gambling other than temporary pleasures, profits that you think are the advantages that you can get, but in quite a short time. So don't ever expect from excessive gambling