I don't think fascism is capable of producing competent longterm leadership. Like the ideology preselects for loyalty above all, it's rabidly anti-intellectual and scorns anyone perceived as being an intellectual elitist. It's purely emotion driven and requires ever escalating emotional rhetoric to keep the based angry at external all-powerfully weak enemies (lazy mexicans stealing your jobs, sneaky jewish bankers crashed the entire economy, thuggish high school dropout gangbangers in the inner city are criminal masterminds responsible for all the drugs flowing through rural communities who would overrun everything if they were smart enough to unify, take your pick of contradictory scapegoat.)

That's not to say incompetence means harmlessness, there's a lot of blood that has been spilled throughout history due to incompetence.