Then there should be some kind of system geared toward the lower end of the game, WHICH ACCOUNTS FOR THE BULK OF THE CASH FLOW... $$$$$$$$
Anyway. This is about balance, which there is nothing being done for the lower end.
If you want your average players to actually be average and distinguishable from new or inexperienced (trying to maintain political correctness) , don't ignore the fact that they are in below average and left out areas of ranked.
It seems as though the very parameters set in place to ensure that no one abuses the system is abusing the average player. (which is a bunk term because right now the average player is Bronze or Silver which is the very lowest)
Expounding:
I'm aware that I should provide some kind of idea to tangent off of if this is ever to be taken seriously, so here goes.
Why not have a parameter that takes into account whom you have played with, and their skill level in terms of MMR. This system would measure to a certain threshold if you continuosly are paired with that summoner in matchmade games. Should the threshold be met or exceeded, the system could then flag these 2 summoners as "Verified" or something like that, where verified would mean "these 2 summoners do not work well together whatsoever and have had enough chances to redeem their paring together"
That parameter would only increase should: Both summoners be reported by anyone within the same game, or, the players skill differences seem vastly different from one another, including some minor stats or behind the scenes info at your discretion.
EDIT: Also, Rage Quitting would instantly exceed this threshold. As you would be reported anyway for leaving, and leaver buster would cite you, there are enough filters for a quitter to go through that this would not be abused!
TL;DR
Either way, yes. Something must be done.
When you know the reason you lost is because of a summoner who went 17/5 and you go 10/2, and that same summoner lost to you but had a simlilar face-rolly score, something is amiss.