Yes, the situation you describe is classic Peter Principle. Having the skills to manage people, politics, & priorities requires a special (albeit learnt) skill-set. Senior leadership obviously trusted you and more importantly, you were Johnny-on-the-spot. It's OK, only a whack-job actually welcomes those headaches. Now that you've 'enjoyed' the exalted Director status, ideally where do you want to go from here? What would stretch you professionally?