It's pretty simple. Just don't end the game when the player disconnects.
If he shut his machine down to avoid a loss on his record, well he's still going to lose, because the match is still going whether he is there or not.
If it's an actual connection problem, then he can attempt to reconnect and continue before the round is over. While this sort of connection issue will likely make him lose anyways, at least he can try to fix it instead of just automatically losing.
The downside of this, is it would require use of a dedicated host server, which a lot of multiplayer console games don't like to do, for good reason.
The alternative is to just stop recording win/losses on a character sheet. There's no reason to farm a perfect Win/Loss Ratio when the game won't display it so you can prove it.
If he shut his machine down to avoid a loss on his record, well he's still going to lose, because the match is still going whether he is there or not.
If it's an actual connection problem, then he can attempt to reconnect and continue before the round is over. While this sort of connection issue will likely make him lose anyways, at least he can try to fix it instead of just automatically losing.
The downside of this, is it would require use of a dedicated host server, which a lot of multiplayer console games don't like to do, for good reason.
The alternative is to just stop recording win/losses on a character sheet. There's no reason to farm a perfect Win/Loss Ratio when the game won't display it so you can prove it.