I would like to know what results the French team should achieve so that you consider this a good achievement. Win several World Cups and European Championships in a row? This is, to put it mildly, a rare event (to win the Euro and the World in a row) and does not at all indicate the weakness of the team. In addition, there is no limit to perfection and you can say about any team that they could perform better. For example, there are also questions for the Golden Generation of Spain

France still missing to be the winner in UEFA Euro after longer time on 2022 and the best edition on Euro 2016 after lead to final stage before beating by Portugal. But France have good achievement in FIFA World Cup after last two edition success lead to final stage and last edition failed after losing from Argentina.
I have bigger percentage with France get good achievement in Euro 2024 Germany because left one years and team dominance by young players make them easy than other national teams have build it with senior player.
Well, just go back a little further, when Italy won the Euro they didn't go to the World Cup, Portugal when they won the Euro went to the World Cup but they didn't reach the final when everyone expected to see Portugal as a finalist, that's something that didn't happen, what of the Euro is important, but when the World Cup is held things change a lot, there are some players who could have played in the Euro but were not called up for the national team to play in the World Cup, so many things can happen, for me a team Since the French have a lot of history and have very high-level players, that's enough to win any competition.