Charismatic and Incompetent Managerial Leaders are Destructive
A charismatic and not competent enough leader are always counter-productive in the long term.
Your Idiot Manager is Ruining Your Chances for Promotion
Having an incompetent manager casts a shadow of incompetence on all who report to him. Determining ways to make her look good, may be distasteful BUT it is the only way for you to get recognized for the great work you are doing.