I try to take honest inventory of myself and ask questions like: "Did I play my best? ", "Could I have done something differently/better?" or similar.
If I played my best and took the best possible course of action in each circumstance then there really is no problem. Like you said, it's just a downswing, a bad run, luck of the draw. It happens to us all.
However, I generally find that there is something I could improve on. For example, if I am responding negatively emotionally to currently being on one end of a bell curve, I need to take a reality check. (I never respond negatively emotionally when I am on the other end of the bell curve). The whole problem, for me, is really the ability to be 100% honest with myself.
A national newspaper editor explained something powerful to me. He told me that all 'front page' news, good or bad, lies at one or other extreme end of these 'bell curves'.. for example; the person born without eyes or the person (recently reported in China) who can see in the dark just like a cat. Everything else lies in the middle and, as being just 'average', is not newsworthy, just the 'humdrum' of normal life. He said 99.99% of all life resides here, but that the other .01% makes up life's biggest 'winners' and 'losers'... Except that they are not really... just 'victims of circumstance', or chaos/randomness/probability theories, either being in the right or wrong place at the right/wrong time.
For example, there will be one or two people who turn up heads on a coin flip one hundred times in a row, and those that do the same for tails. Are they really very lucky or conversely, very unlucky?
Statistics, chaos theory, and randomness probability would all say no. If 50 million people enter a lottery jackpot competition, a 'lucky' few will usually win. Again, are they really lucky? Is everyone else unlucky? Logic says no, it's just probability laws in action.
The problem, for me, is when I think with my emotions rather than my head, and having weighed up all my actions, still believe myself to be 'unlucky'. Science says no.
However, maybe (in all probability) I do need to improve in certain areas. That means it is under my control and I can do something about it. I need to constantly recognise those things that are within my control and those that are not, and not to lose any sleep or worry over the latter.
Hope this sorta makes sense and helps. I've written this as much for my own sake as yours, getting my thoughts on the issue down on paper so to speak. Was it Phil Ivey who said the great thing about Poker is that any two cards can win? It just sucks when it's a 5,2 unsuited filling a straight against your pocket Aces all-in pre-flop. (True story, lol).... Good 'luck'!
