back-end code bug / missing critical feature: loss prevention

bug: 4 leavers in 1 game, not loss prevented. Ideally, back-end code should detect this situation and auto-end the game. However, if this is difficult to implement for some reason, at least detect the situation and don't subtract from the ranked score of players on the losing team. As I see it, this game should have been auto-ended by the server after the first few minutes started out as 2v3. 2 of the enemy team returned, making it 2v5. This is not fair. I should not lose points on my ranked account because of Riot's poor back end code. Additionally, it's annoying waiting 20 minutes for an auto loss. It's not like the game started and people left. Only a few people even played at all. This condition is simple to detect.