I've probably played 15-20 different nights of my life. There was a time or two when I went up $500 or so and kept playing and eventually lost. But most of the time, I was just a quick loser.
I remember at brother's bachelor party, nobody really knew how to play but me. I decided to sit out and just help them. Basically told them all what to do at every turn... within an hour or so, the 4 of them had made a combined $3K... I decided to give it a go... sat down with just $100... and 6 hands later was out. Was very frustrating... It's just been bad luck.
Another night I was on a bit of a run. Then some lady sat next to me and hit blackjack on 4 of first 6 hands... she was only betting the mins where I was betting hundreds. Had she not sat down those would have been my cards. Just bad luck