He inherited a dysfunctional mess that was produced by international capitalism.
The roots of Germany's entry into the Great Depression also stem from domestic conditions, particularly in agriculture which resulted in various imbalances in the economy. Even if you want to blame the Versailles system (an at of states rather than capital) you would be in error, given the long term negotiable loans made available for that and the early role of German leaders.
He inherited an impoverished citizenry who were dominated by a tiny, non-productive elite.
Prior to the depression, Germany was not a poor country at all and economic statistics show it was starting to recover before Hitler's rise to power. Given the economic troubles Nazi Germany was facing around 1939 I would also have to cast doubt on the idea that Hitler created a productive elite, when in fact the Nazis were just running up debts into non-productive sectors like the military.
Napoleon didn't exact inherit an economic power or popular government either. Perhaps you forgot but Napoleon came to power while shooting protestors.
He inherited a society that had gone mad on industrial damage and propaganda.
Which he reversed by implementing an economic policy that was... in practice heavy on industry, and stayed in power through... propaganda. Napoleon on the other hand inherited a country which had not long prior been invaded by other nations.
Along with your point above about tiny elites it shows that Hitler wasn't a reformer in the same way that Napoleon was. Nazi was a variation on the past trends in German leadership, rather than a change. Napoleon's egalitarian laws and treatment of the Jewish population stand in stark contrast to Nazi Germany's attempts to limit opportunities (see gender equality, Nuremberg Laws) and famously appaling treatment of Jewish minorities.
And he never really got a chance to change his society for the better.
The Nazi party put in place many social policies during its time in power (including such gems as T4 and the Nuremberg Laws... you wish Hitler had a chance to finish that one off...?), there was no apparent issue of time. Unlike Napoleon, there was no pretense at installing these institutions in countries that were defeated.
Also in terms of time period, there isn't that great a disparity. Napoleon had the top job for about 15 years (from 18 Brumarie to the Treaty of Fontainebleau) while Hitler was in power for 12 years (from being appointed Chancellor to blowing his head off). The wartime point I raised is quite relevant if we want to compare relative resource availability and options available. So the idea that Napoleon somehow had decisively more time than than poor old Hitler is an idea that could only be based on a poor understanding of the periods being discussed or fraud.
The only point of accurate comparison between Hitler and Napoleon is their apparent obsessions with, and subsequent actions directed to, European dominance via military force.