I've flown through a French airport once - Paris Charles de Gaulle and since have gone out of my way to not fly through it again. It was a hot mess. They lost the luggage, it was hard to find gates, parts of it looked outdated, customer service sucked. A year after, the ceiling at its _new_ terminal collapsed killing several people (https://www.thoughtco.com/charles-de-gaulle-airport-terminal...).

Maybe it was just me having a bad luck, but it was certainly enough to convince me to stay out French airports even if it means longer flights, delay or changing the duration of my stay.