ok, since my first cruel message, i thought of a little bit more positive suggestions. I often hear people complain that they have tried a few things and none of them "worked". But what exactly do you mean by that? Let me guess... for most of my acquaitances, it meant: did not find a magical recipe to make 100% per year preferably without risk. Less than 100% per year, or maybe per month, was unacceptable because they only have 10K or 5K capital, and any less return is not worth their time.
If that is the case, then of course, it is indeed not worth your time, and it never will be.
But if its not magical recipe you are looking for, what does it mean you didnt find "anything"? Suppose you are looking at some market. Absolutely any strategy will either make money or lose money - after you subtract the return from buy&hold. If its negative, you can just invert the rule, and make the return positive. That is actually not always true, because if you are already modeling the return taking into account the transaction costs, or bid/ask spread or whatever, then the return may be negative even with the opposite strategy. (if that is the case, i sugest to think of your return as positive regardless, but the transaction cost as the minimum threshold to be overcome as you improve)
OK, so what you are left with, in the worst case scenario is a very low Sharpe ratio, or information ratio, or whatever other criterion you are using. But it is not NOTHING, you just have to improve on it over time.