Have you had one in the past?

Maybe you have one currently.

What made/makes them “bad”?

Whatever those things are, are you able to take those into account, if and when you’re the boss?

Over your career, you may learn as much, if not more, from a bad boss on what not to do, than from a good boss on what to do.

I know I have…

Allow a bad boss situation help you to become the good boss you aspire to be.