Let me get this right...
My LP loss is dependant on whether or not I should have beat the enemy. if I shouldn't have won, the LP loss is smaller (~14) and if I should have I lose a lot more (~21).
If that's accurate, wouldn't it be much easier to track down trolls? So if it's toxic language, or anything chat related, that's not associated with LP. Scan the chat log, make an assessment. If it's a complaint about trolling or griefing, would you be able to find the more egregious ones easiest by the LP loss associated with the game?
Apologies for my ignorance, but I just wasted another 30 minutes playing with (I would guess) two people who showed up to intentionally ruin the game.