I am not searching for a shortcut, but trying to figure out where I am lagging.
But I am afraid I may end up wasting half of my life in finding out a perfect strategy.
Probably no or random strategy is the right approach ? or just searching for a new strategy is the real fun in gambling ?
Look into poker, investing or trading. Those are pretty much the only risk "games" you can improve and start profiting in. I have a lot of personal experience from poker. You can improve in poker as much as you can, only sky is the limit. There are countless new strategies (that actually work, unlike in regular gambling) that you can use to profit a lot. You just need a lot of discipline and time to succeed.
Trading also takes a lot of time, to learn how to correctly predict markets and trade profitably. This can also bring big profits if you invest a lot of time in learning the signals.
Last, but definetly not least: investing. In investing, you can expect small yearly returns on "safe" investments. That would mean you would need a big capital to get meaningful yearly returns for your money. Then there is also risk investing, in which you can make huge profits, or lose everything you invested. You can also learn to spot good investments that aren't scams and will rise in money.
Good luck with finding good investments!