Opponents leaving after red card. Should be a forfeit

Tired of opponents taking red cards at 0-0 and then leaving the match while I've wasted my time playing because I'm not credited with a win for them essentially forfeiting. Has happened at the beginning of games, middle of games, and end of games. Just give the win to the player who doesn't quit for christ sake and count the disconnect as a forfeit for the player that leaves,