I find it bizarre that you decided to stay in that game when your teammate quit so early on. Most of us just accept our fate and concede if a teammate disconnects, cause 2v3 is usually hopeless. I mean what else did you expect?
I tried my best not to farm the AI in that game but sometimes it's unavoidable, especially late game when the AI goes down in the matter of a few seconds. Of course my teammates weren't exactly accommodating to your request, but then again your attitude and taunting wasn't winning any friends either.
Just concede, it's what the rest of us do, one loss isn't the end of the world.