I think the worst in gambling is that you win a lot but because you are greedy and want to win much you bet all your winnings and your capital that you own. I think that is the worst that would do in gambling, if only you win then that's good but the chances is 50% and if you rest when you win then that is the best way to gamble.
It's alright to be greedy if you win a lot but that does not happen in real life, we want to win a lot but we don't easily get in.
Sometimes we have our lucky day and we win a good amount but that is only for temporary period because the next time we gamble we might not be able to do it again, it's just a luck that gives us a win therefore we have to see our real chances and just enjoy the win and accept when you lose.
In the long run we all lose, so it's not a surprise for every gambler, we are spending to have fun but they run their business for a profit.