Although I don't believe Germany would have left France to govern themselves. Bismarck antagonised Napoleon III to gain control of Alsace and Lorraine in 1871, declaring the new German Empire in the process. These were only part of the treaty which also took a large indemnity from France.

I would have Germany win ww1. They would have handled European affairs much better than France and Britain and IMO would not have punished the allies so harshly
The new German Empire was not exactly lenient on France in that particular treaty, so who says they would act differently in 1918? So you could argue that if the Prussians under Bismarck hadn't been so harsh on France then the allies would not be thirsting for revenge in 1918. But then you could argue further back and further back and further back...

Probably it's best not to meddle in history, only discuss what could have been. Probably the best thing for the planet was that humans never came to be! Allthough you can argue cases for and against that also.