However, rather than leaving the details to her, he constantly micromanages every decision she makes, and won't get out of her way to let her do her job, although he is constantly telling her how competent she is. When he gets in the way, he often fouls things up because he doesn't have the complete picture of what is going on. But we may also be bumping headlong into a deep-rooted problem that is control, with this boss. The communication I'd suggest would be to approach him on this, starting with how long you've worked there and your experience. Some of the sting is not so strong if humor can be used.
Life is too short.
My guess is that there might be some areas where this boss has qualities that you may not be recognizing because your vision may be blurred by the fact that you are indeed more qualified in most areas. So a negative cycle doesn't continue to grow. If you get a negative response when asking, which I imagine you'd get if you were asking for your boss' job, or advancement to another section, if you have a good boss you are in luck. You might take one shot over their head on your way out. That's a one-shot deal, and it sometimes, more often than you think, works.