The French resistance in WW2 was fierce and daring from what I read. I think the problem lies in the ineptitude of their high command during WW2 by allowing the troops to be routed by bad decisions. That and the fact that Parisians low opinions of Americans (outside of Paris, I found that the French are very hospitable and regard Americans with respect) make them an easy target for ridicule.
That being said (and I apologize), I can resist this joke:
Q: How can you identify a French Infantryman?
A: Sunburned armpits.
WWII French rifle for sale.
Never fired and only dropped once.