France is an amazing country don't get me wrong, but you can't just sweep everything under the rug just because it has good social safety nets. Living in a place with a strong french diaspora and having tons fo family members living in france, the things I hear the most from them are the grim employment prospects, the lack of opportunities and a hopelessly stagnant economy. And this was before COVID.
Lets also not forget the extreme levels of intergenerational, hard to escape destitution minorities living in the Cités experience that make even america look good when it comes to social mobility for it's minorities. And, while I'm not a fan of the (overused) concept, France has neocolonialism as a foundation of its exploitative african policy. There's also the rampant homophobia, ingrained misogyny, very, very casual racism... you get my point
There are even comments saying, unironically, "if you aren't happy just move instead of complaining". I couldn't imagine that type of argument not getting absolutely destroyed if it was a thread about the US, the UK or Canada. I guess we just hear a lot more coming from english speaking countries, which skew how we view countries we don't hear problems from.