They also had better fighter planes.
But due to politics their pilots had very little training because the bickering politicians would not fund training. So, they were easy pickings for the well-trained German air force.
On paper the Germans should not have won.
The German Bf-109e was the best fighter in the world in 1940.
The French air force had hapless types like Bloch MB.150, the prototype couldn't even get off the ground.
The M.S. 406 was 50mph slower than the 109
They had some American P-36's but again, they were no match for the 109.
To make things worse, most French fighters had no radios.