No way The Low Countries had the wherewithal to stand up against the Wehrmacht. And I think the Brits and the French were still fighting with World War I tactics, totally unprepared for blitzkrieg and massive armored columns.
Blitzkrieg wasn’t an unknown concept. It was actually the Russians who first used it against the Japanese in China with sweeping success. It was all observed by everyone else. The Europeans who were readying for another WWI should have seen the writing on the wall.