I think you can get this achievement more easily by playing some Head to head ranked matches... and,
First, if you are one of truly skilled DOW2 player, then this is a piece of cake when your trueskill rank is not very high, and meet some low-ranked newbie player who is not understanding game mechanism. Capture the victory point early and win!
Second, if your opponent didn't decrease any of your victory point and QUIT, that's ok. Pray your opponent screw up and quit early :)
ps. I got mine like second situation. I have only two wins now in ranked head to head matches, and often met players have trueskill rank over 20 :(