Create A loss Prevented, For AFK and Feeders.
I believe that there should be a system where it can detect if someone is intentionally feeding. Say they walk into the other people doing little to no damage, or stands in just one place for a while, or basically when we have an AFK person or someone just walking back and forth to deem the game loss prevented. If the system does not detect feeding or AFK try to at least consider if you get two or more report about the summoner to do a quick scan through their match history and check some components like score and damage done ECT, and maybe check through that game look through the chat it might say oh I'm feeding blah blah blah or I'm going to AFK because you all suck.