In fact, I feel that the son-in-law you mentioned has a psychological problem. In fact, it shouldn't be difficult to work in other companies on your terms. There is no need for you to suffer indignities there. Boss, you really don't even know the most basic way to make money. I can't think of any way to deal with such people except violence. He's still out of thin air. There's nothing you can do about him. After all, he is a son-in-law Maybe he can find a colleague who is good at a good job and is not afraid of not eating or listening to the cut the gordian knot upstairs.