Having a bad manager in past roles can be some of the best "manager training."

If one your past managers did something recommended in this article but it caused problems, that's ok! It just means you have seen another failure mode that the author didn't experience.

I remember being in a meeting with a bunch of the best managers at a former company. "Why did you originally want to be a manager?" was one of the first questions passed around the circle. The most common answer was, "I had this one really bad manager and I figured that surely I could do better."