If you feel insecure, say it out loud.
The alternative is to try to take control of everything, check that work is done according to your taste, grab both strategy and execution, possibly move from one place to the next without achieving nothing that is worth sharing, shout in the face of those who bear no responsibility, be kind with those who bear plenty, judge for the fear of being judged, diminish others to maintain the feeling to be on top.
If you feel insecure, say it out loud. While people tend to stay clear from the behaviour listed above, they appreciate vulnerability and the capacity to own one’s own feelings. Furthermore, the moment you name it is the moment you start getting more secure. And a whole new world will open for you.