Trading courses and coaches are useless- true or not

Dear Hui friends, how to solve the situation of small profits and big losses?

Do you feel lonely doing business?

Watching trends and doing analysis until late at night, no one cares about losses, no one applauds profits, good or bad, only you know, are you lonely? Do you enjoy solitude?

Why do really successful traders never share their methods or strategies?

What should I do if my trading system encounters a retracement?

If you want to make money in trading, what principles do you need to understand?