How to create "elo hell":
Firstly, we will place complete noobs into silver or higher for winning a couple of matches. They know very little of the game, how to ward, how to focus the fragile damage dealers on the enemy team, how to NOT constantly chase fed enemies into unwarded jungles, how to fight by their own tower when they are behind in lane and wait for assistance.
Next, we will encourage noobs to be irresponsible, tattletale cowards by letting them report for anything and everything when they fail to adapt to the game. We will not bother letting them mute people or leave their filter ON if they don't want to see the very words they themselves use all the time. (whish also makes them hypocrites on top of being cowards)
Then, we will punish the players that they have reported, often times for nothing, who play like gods in comparison to said noobs. Causing them to either leave or be banned. Thus leaving an even higher amount of worthless players. (except that mommy/daddy buy them riot points)
I suspect this has to do with profit margins, as with any company who starts raking in millions of dollars. Greed is a true game ruiner. Always has been. That is my input on this subject.