I'd probably flame Riot too, given that the problems with the player behavior system are obvious to anyone that's touched ranked, and yet they remain unfixed for ages.
What are those problems, you ask?
-
Lack of feedback (feels like reports do nothing)
-
Blatant and obvious trolling allowed to continue for ages and ruin many more games, because the reporting system looks for "patterns of behavior", rather than dropping the hammer on obvious trolls immediately.
-
Troll lifetime is long, so they tend to cluster around low-elo ranked matches. Great for Riot, since new players (with lots of skins and champs to buy) won't see near as much blatant stupidity in their normals. Less great for everyone else trying to climb.
That last one might seem a little bit cynical, but I am truly having a hard time coming up with a reason for the continued lack of improvement and action on the player behavior front that doesn't boil down to it just not being a priority for Riot. Especially when fixing the perception is remarkably simple: start giving feedback on all reports, possibly bring the down-for-"maintenance" tribunal back.