I think it’s a pretty safe bet that the person who wrote these guidelines says the words “Yes mistress” a lot more often than most people.
I think that the person who wrote it IS a bully, or else grew up in a horribly dysfunctional family. Imagine the outcry if they gave out this kind of advice to domestic abuse victims.
The one about not showing anger, but showing hurt is especially silly. If you’re dealing with a sadist or sociopath, and a lot of them are, they don’t care about your feelings. Indicating weakness to predatory types gets you off on an abusive foot.
One of the most valuable lessons children can learn is how to tell the difference between people who mean them well and those who don’t. I wish I had learned it when I was growing up. But when a child grows up watching adults play cruel games with each other, he or she won’t show very good judgement about these matters, I suppose.