WWI Germany: Japan is an enemy
WWII Germany: Japan is an ally

WWI Germany: Italy is an enemy
WWII Germany: Italy is an ally

WWI Germany: Romania is an enemy
WWII Germany: Romania is an ally

WWI Germany: France, and even Belgium, withstand for 4 years
WWII Germany: France and Low Countries collapse early

WWI Germany: Almost win, and probably would have if they had just a few more advantages


So how did Hitler manage to fuck it all up?