You are right; I should have been more specific; his ammunition re-supply worked. His ration and forage system never did. `Swords` details the farce quite clearly.
I do not have to compare N`s system with any other; it didn`t work.
Just think what those 300.000* men could have done in Spain IF they had been effectively supplied with food and forage.
That would not have cancelled out the guerrilla warfare, but it would have meant the French being able to operate effectively and not have their strategy dictated by the absence of food, as in the case of Victor, south of the Tagus in 1809, a strategically vital region, which he had to evacuate because his soldiers were starving.