The bumbler boss is the dunce of the bosses. The best way to deal with your bumbler boss is to help get him promoted. When bumblers are promoted, they are notorious for promoting the people underneath them. Besides, sooner than later, executives will see your boss for the dunce that he is, and he’ll be shipped off somewhere. Now of course, following this advice makes you somewhat of a manipulator, but if you can’t get out from under him, why not help you both climb up? You’re not responsible for what happens at the top.