France may not have focused on penalty shots which is why they lost on penalties in the finals of such a big tournament like the World Cup. The early counter that Argentina scored against France should have been defended by the French defense but failed there. Due to defensive errors, France was behind in the first half, but due to the responsible performance of the forwards, France eventually returned to parity in the final match. France football must work on the mistakes they had in the World Cup final. I think every player should be more experienced in penalty shootout because such a situation can arise at any time of the match. If you are experienced in penalty shots, the result of the match should be in your favor.
Defensive players of France is not as bad as people think, it's mainly because Argentina is a great team. When you fail to stop Di Maria, that's not really a big deal, I understand that you want to defend him and you should, that's why you are playing, but if you fail to, that's also understandable as a fan for me.
I can easily say that Di Maria is one of the best wing players out there, even at his age he was great at the finals as we have seen, so not being able to defend him doesn't mean that you are a bad defender, it just means he is a great winger. In the end France is a wonderful team and will probably win some more cups with this generation.