I beleive RIOT games is the truly toxic member of this community and here is why.

Il'll give a pass on game direction, champ design etc...

Here is the real reason as Riot is 99% responsible for most every toxic game experience you ever have. Hear me out. play ranked matches, after you lose look up your teamates all wager in a large majority of cases the people on your team who did poorly a)never played the champion hardly at all if ever. b) almost never play that role c) more than likely both a and b

the sad part is these are all 100% under riots control and extremely simple to fix.

a) require a proficiency in normals to use xxxx champion in ranked. b) allow people to click a box allowing them to accept a longer que to ensure no one is auto filled on their team.

Boom done those just came off the top of my head and im not even very bright. You know what happens when you keep letting people who cant play their champs well into ranked? They do poorly ruin the game for others which leads to people getting angry, you allow this to happen its actually riot who is at fault for this. Same goes for autofilled many people get angry the moment they get auto filled to support pick garbage champs they dont know how to play they dont care about trying and again it ruins the game for everyone thus everyone gets frustrated and angry and again 100% under riot games control its on them.