I found a way to reform. All you have to do is /mute all in every game so people don't get offended when you tell them that they engaged 4v5 while you were split pushing.
I find that I actually win more games, when I don't say a word to my team. It allows me to focus without having to deal with all the sensitive fuckbois on this game.
I highly recommend making a /mute all macro. Best decision I've made.
Firu1 votesI am not entirely sure the team doesn't still see your chat if you mute them.
Kei1431 votesgood for you for understanding that lashing out / flame wars (or defense) is results to distractions to winning the game.
when you /muteall, it just stops you from seeing what they typed. They can still see your words when you type. But at least you don't see their chat so the chances of you lashing back is none.
RIP Resonance1 votesWell, last season, you were able to shrink your chat to a scale which it couldn't be read. I usually only say things if spoken to, as it's in my nature IRL as well, so I shouldn't be punished anymore.
Also, this is typically how I was "toxic". I play as support, so I used to think communication was important. Now I know it's not, so I usually only use pings now.
Them 
: Why didn't you triple kill them after you got back to lane, after telling me to play safe since I picked an immobile AD?
Me 
: Uh, I needed to get 
and 
so I would be able to peel you and be aware of where our enemies are.
Them : This supp... (Note: that they don't even take the time to spell support and stopped halfway then typed ... afterward. Clearly they had time to type three more characters, but decided to be passive aggressive with ...)
Me : kk roaming have fun solo
Them (Little did I know they were 4 man premade. (Thank you Riot for removing duo queue detection and implementing DQ)) 
: Mid is open... Report supp pls...
That's essentially my toxicity.
Kei1431 votesIf that is all that happened, you won't get punished.
[zombie-nunu-bummed]
and you can still reduce your chat to unreadable right now.
RIP Resonance1 votesCan you link how to do that?
CriscoWild1 votesMuting the rest of your team doesn't keep them from seeing what you've typed in chat. It just keeps you from realizing that they're still getting offended.