1: I started a company with friends. The business plan had severe flaws that meant a constant struggle with staying operational. Also, for the other founders, our business enabled them to do the work they wanted to do, but for me the synergies never materialized in the way I had hoped. The main thing that burned me out was that I saw the problems and had to deal with them but couldn't find a way to actually solve them. I had responsibility but did not have self-determination. I believe that will burn anyone out in short order.

2: I left.