Sorry to hear that (I'm French myself, but have worked in US and now in Netherlands). Apart from arrogant bosses, do you have more gripes about french's work culture? I think we are pretty pessimistic in general, especially compared to americans :-) But I think that's more of a european trait (we call it being honest).
Nope, not really :) In fact, I'm a pretty big fan of French culture in general (being able to read Balzac or Stendhal in original is certainly a treat for me). About the French work culture in particular, my other "small" complaint is that I think the 35-hour week is not going to work. I went to Perpignan as a tourist in 2007 or so, and I was a little bit surprised that the only "tourism info center" had a 1h-break in the middle of day, with nobody left to answer requests. That's not a French-only problem, though, I saw similar issues in Barcelona or in Greece.