I don't agree that there is a large gap between France and other European teams. France currently maybe is the best team in Europe, but England and Spain are pretty close. Just look at how they got kicked out from the final four of the Nations League. They got one win in the last 5 games played and finished third after Croatia and Denmark. I know that Nations League is not that important competition, but it still is a competition and I'm sure that France fans would love to see them in the final four.
I just wanna say that France may be the best team in Europe, but they are not unbeatable. Especially in the knockout games where one red card or one penalty can change the outcome of the game.
We are talking about something that happened almost a year ago. Yes... France didn't performed well during the 2022–23 UEFA Nations League. The management didn't gave much importance to this competition, and the players themselves looked not very interested. There were quite a few upsets. Started with France going down 1-2 against Danmark (after scoring the initial goal). Then Croatia got a lucky penalty, which helped them to hold France to a draw. Then again, in the next match another penalty enabled Croatia to defeat France.. I am not defending their performance in this tournament. Just saying that France of 2022 June is not the same as the France of 2023 April.
You failed to mention that France lost to Denmark in the last round of the competition and almost got relegated from the elite class of the competition. Croatia saved France from relegation with their victory against Austria in the last round

According to you, all those bad results of France are the result of bad luck and not the bad games of the French in that competition, which I would not agree with. In all 6 matches of this competition, France was bad, and there is no question of any bad luck.
French footballers were not motivated while playing for their national team? Really? I don't think so.