True...somewhat. But read a detailed history of the Battle of France. And compare the command performance of the B.E.F. (under General John Vereker, Lord Gort) with the command performance of General Maurice Gamelin (C-in-C of the French Armed Forces) and the next tier or two of French generals under him.

For Lord Gort - it wasn't his country, he'd only been appointed to command the B.E.F. the prior September, and he'd been shuffled through a lot of different jobs in the prior decade. (Including time spent in China and India - hardly useful experience for WWII in Europe.) Still, Gort and his immediate subordinates got their sh*t together, moved fast and made good decisions in very new, chaotic, and challenging circumstances, and did extremely well.

For Gamelin & Co. - it was their country, defending it against a German invasion had been their d*mn-obvious Job # 1 since at least the German invasion of the Rhineland (March 1936), and they'd been building the Maginot line since 1930. Yet their performance in the event was laughably slow and weak even by the 1914 standards of French General Joseph Gallieni. (Who had been recalled from retirement, was in obvious poor health, and had served most of his career in French overseas colonies.)