Trading courses and coaches are useless- true or not

As a trader, how can you make a stable profit?

Can retail investors make a lot of money by trading? How can I earn it?

I have had a few positions liquidated recently, but fortunately the losses were not very large. I would like to ask everyone, is there any way to prevent liquidation? Is there any trading discipline?

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

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