It's amazing that a whole country could have a vernacular of bad web sites, but I think France has managed it. Hotels and restaurants regularly have terrible sites that give the user "an experience", complete with Flash and music and precious little useful information. For a typical example, see the text-free site of the luxury restaurant La Tour d'Argent. Or try to "enter" the site for the Petite Nice Passedat.
To be fair, a lot of American hotel sites have stupid "experiences" too. But in France even the informational sites are lousy. For example, Mappy, the main French map site (now obsolete, thanks to Google). Marvel at that front page, with 16 separate text entry areas.
But the king of awful websites is the SNCF, the online train booking. The have a site in English, which is awfully nice, only about a third of the links don't work and give you French error messages. Here's how to book a train:
I'm sure there are some wonderful French web sites out there, and I personally know some great French web designers. But the examples I keep finding are just awful.