Their practice can only be said to be legal. As for whether it is reasonable or not, it's hard to say that they have no obligation to help you deal with it. It is only an intermediary, that is, it is only a middleman. As long as you and the other party disagree with the mediation plan, it will not succeed.

You can apply for legal aid from the judicial office, or ask what you need to prepare, which may not be able to directly help you sue, because the duty of the judicial office is not to help people sue;

The issue of loss needs to be ruled by the court, generally including investment and future income;

Going to court for prosecution is a professional matter. If you can't finish a sentence, you might as well go to the court or judicial office for consultation, or find a local lawyer for an interview.