Honestly the whole Weimar turning into Nazi Germany thing was kinda a fluke historically speaking. Usually the empire in question implodes, stagnates, or decentralizes usually a mix of atleast two, unless it’s Rome where they will do all three plus a secret forth option and come out the other side.

The Nazis frankly speaking had Alexandrian level plot armor, if anything had gone even slightly different they may have collapsed before even operation Barbarossa.