I do not know much about economy, but perhaps mefo bills scheme fails spectacularly? Or simply Hjalmar Schacht dies in 1933 and his successor is not even half as good as Schacht was?
AFAIR the fast rearmament of Gerrmany and investing pretty much only in arms industry would have murdered German economy about 1938, if not for Schacht's tricks and gold reserves captured in Austria and Czechoslovakia, but even they would have only lasted until 1940.
the were close to financial collapse in 1938.
reason Hitler was "trowing the money out the window" on rearmament of Wehrmacht, building the Autobahn and his megalomaniacal buildings
and minister of finance and economic during that time was Feldmarschall Herman Göring !

so there is a realistic scenario were third Reich could economy collapse.
Hitler solve the problem by removing Herman Göring from this post, and attack poland and switch to War time Economics.
that is taking the richness of conquer country and use it for own Economics...
Back to The Third Reich goes bankrupt and economy collapse before WW2.
the Germans will wake up from there illusion that Nazi is the salvation from Chaos of Weimar.
but there only a bunch of hypocrites who transform Germany into Dictatorship.
at begin the people will to hoot on Hitler and others on Public meetings
then they will trow rotten eggs and tomatoes on Hitler.
next they try to shoot or bomb him.
in end it will a civil war between the Nazi system and the common people...