We are not slaves, we are employees. We have the freedom to change jobs. The worst thing you can do is stay there and bring disrespect on Christ. At first it seems as if this is a bit one-sided. However there is a reason for that.
Employers are to treat their employees in exactly the same way.
You are not better than your employees. You are where you are because God has given you that place of authority. If you want gracious employees you must yourself be a gracious employer. You have to earn these things . Employers don't use your God-given authority to bully and intimidate your employees.