Assume someone is really intent on having a very good win/loss rate.
There is a 75% exp penalty for frequent leavers, which means frequent leavers will level up significantly slower.
Matchmaking is at least partly (?) based on level.
Considering all of the above, would it be possible (and prudent) for someone who seeks to maximize their W/L ratio to quit every very likely lost game before the end, in order to be matched with newer players for longer?