The French were no more, or less, cowards, than the Germans were sadists. People just find it easier to paint with a roller, than to dab in any detail. Good and bad everywhere, and you usually find what you are looking for.
I think the "cowardly french" thing comes from them consistently losing wars for a few centuries as well as the fact that the British felt the French were.....less than enthusiastic about offensives by the end of WW1. The British felt they were doing all the heavy lifting on the Western Front, and to a certain respect, they were.