EURUSD daily short signal

In trading, how to solve the problem of being hit by the market back and forth with stop loss? What is the basis for the solution?

Winning ratio and profit-loss ratio, which one do you value more?

A handful of bitter tears, I have been trading for five years, and I still lose money, what should I do?

How can I have the ability to make stable profits?

My usual trading system continues to fail, what should I do?

If a trading system built by myself often fails and causes losses, should I abandon this system and replace it with another one? Is there a stable and profitable trading system?