I watched it last night. It really skewers the German high command with their standard of living vs the life of a common foot solder. i thought it was very good. Some movies could attempt to glorify the German position. This movie does not.
I recently watched Paths of Glory with Kirk Douglas. It does a very similar thing to the French high command and the very real divide between the titled aristocracy and commoners. One could look at WWI being a way for the aristocracy and their lap-dogs to thin the ranks of the underclass as they saw it.
You can certainly understand the disgust the common man had with the World Order that created that catastrophe. The Bolsheviks tried to exploit that disgust, and they came very close to truly achieving a worldwide revolution as a result.