Of course, the GA clearly messed up. But you obviously recognize that your mistake was in not identifying the GA's error initially. Hence my original comment said you should accept "some responsibility" the operative word being "some." There are posters on here who seem to think passengers have no personal responsibility. I'm the first to slam an airline when they screw up (and getting called out on other threads for that, while possibly being labeled a DL apologist here, so go figure ), but this one works both ways.
Shame you didn't get an opportunity to head into Paris; I had an unexpected 24 hour layover due to a misconnect on AF earlier this year, and it was great to be able to go into town, see a good friend for brunch, and do some shopping. Definitely turned that lemon into citron pressé