By now I'm sure everyone has realized that if you win a game or two, Matchmaking will realize that you are doing well and give you a free loss.
Now I understand that this is a necessary evil done to piss people off and d*ck them, and to discourage people from doing well. After all, if people were actually allowed to continue being matched with decent teammates and having a nonzero chance of winning on EVERY game, then some people could potentially (with a bit of luck) end up having a bunch of wins (which is obviously unacceptable). Or even worse, they could get all uppity (gotta put the masses down, right?).
However, I feel that the actual playing out of these games need not happen. Instead, matchmaking can alert you to the fact that you have recently won some games, and that you are overdue for your free loss(s) of the day. Then, you should be given the option to play it out or to simply accept your fate and take your free loss. This way, the end result is still the same: matchmaking shoves free losses down your throat, but it's much less annoying and painful since it's over much more quickly.
Edit - Added some potential concept art to illustrate the idea. Included are two possible depictions of this suggestion.