I started in tech as a network engineer. Eventually I ended up in a management position and thought I was doing pretty well simply because I was the most talented and knowledgeable person on the team, the team liked me, and I was able to mentor each of them. In truth, I wasn't doing much of a job at all, acting little more than a technical lead.

The second management role I took, I inherited a team of low performers. I had no idea what to do other than to demand better work from them eventually doing most of it myself and causing them to feel that they were incapable of being successful. I was a failure as a manager.

Following that I tucked my tail and moved into an IC role for a while. I read every management book I could find and eventually made my way back into management once I came to the conclusion that management, in and of itself, is a job that must be one's first priority. Getting work done becomes secondary.

I know I'm really echoing other comments already in this thread but it's worth repeating. Management is a skill that must be learned. It is entirely about doing what's necessary to make other people successful and often has very little to do with the practice of actually doing work.