That is because of France's own history. It has long wanted to play a global geopolitical role. In Europe, at least, France is the country that has most resisted and resented American power. The British are perfectly content to be a kind of deputy to the United States. And while the Germans stopped aspiring to a global geopolitical role after World War II, the French have always wanted this kind of position.
Globalization is also particularly hard for France for cultural reasons.
France is extremely proud of its culture, of its food and traditions, and of its art and history. There is also, I think, a stronger resistance to a harmonized culture based on American norms in music, books, Hollywood movies and other forms of art and entertainment. So, when you put all that together, it is harder for France to accept globalization than it is for most other countries. When French leaders call for a more multipolar world, they say they are not criticizing the United States, merely the concept of unipolarity. But that is cold comfort for Americans, who rightly interpret the French aim as being to reduce U.S. influence in the world, at least relatively speaking.