I think the seats in business in Air France are ok. They are already looking ratty and dirty in many planes, they are not as good as Qantas for example, but I always sleep well on them.
The entertainment is a joke of course compared to better airlines. The screens are usually faded and unreadable (if the system is not completely defect) and the choice is dismal. However, if you focus on the French and art films and keep an open mind you will be rewarded with some gems quite often.
As to the food & drink. Yes, absolutely incredible that Air France spends so little money and attention on this. Generic, uninspired wines, often so-so or simply bad food, terrible wine service, etc.
CDG is getting better as more and more comes on line.
All in all, AF is better than KL, better than the American airlines, but never worth paying more than a heavily discounted price for.