It had a very capable Army in 1938, along with favorable terrain* with well placed defensive fortifications and a capable arms industry, all until it was literally sold out by Chamberlain. Instead, all of that was given to Germany without them having to fire a shot. Chamberlain was a fool, and his betrayal of Czechoslovakia was beneath contempt.

In 1940, France had hoped to hide behind the Maginot Wall, so the rest of its military had been largely neglected. When the Germans managed to flank the Maginot Wall, France was toast. There's no way Britain could save France.

*Never underestimate the effect of favorable terrain to tie up ground forces. Go read about what our troops went through when trying to move through Italy in 1944. Mountainous terrain makes for a much stronger defensive position.