It's entirely possible that some big CEOs can't do well with a small company of 10 employees or so. A lot of the skills they have are mostly focused on managing

It's entirely possible that some big CEOs can't do well with a small company of 10 employees or so. A lot of the skills they have are mostly focused on managing larger organized teams, which is not the same skillset for small teams. It's strategy vs tactics. Maybe at one point they could, early in their career, but by now those skills may have atrophied.