Could you explain your reasoning? If someone leads your country to disaster... how is that great?
If someone leads a country to a worse state than when they got control of it.. how is that great?
Germany, coming from a record breaking defecit and abosolute misery, after world war one, was led by Adolph Hitler into a super power (at the time) that defeated most of Europe. Not saying he is a hero, but a good leader. Yes, regardless of where he may have led his nation, it was still he who taught them to be proud of their nation and to take arms in a time where it seemed they were doomed.
I think if the Allies were not so cruel to Germany after WW I, Hitler would not have stood a chance in hell in creating the momentum for WWII.
He was an excellent leader until he got greedy. I think he was always psycho, so although an excellent leader a terrible humantarium.