I feel your pain. I've encountered a lot of quitters too.I need to rant. Been trying to get the Hard Earned Win achievement where you beat a 5 star team with a half star team. Tried it twice online but both times the other player quit.
First game I was winning 3-2 in 119 mins v Barcelona and he quit just as it was about to finish.
Second game I was winning 4-0 after 40 mins v Real Madrid and he quit too.
I wish people would actually finish a game they lose every now and then
When you were playing Barcelona, did you actually think the guy might let the game finish? Can imagine you did if it got to 119 without incident, heh.