How to win games using chat
**The Basics: **
Constructive criticism: You aren't insulting your teammate beyond pointing out their mistakes. Constructive criticism>flaming. You can explain to a child that he needs to work harder on a subject to get better grades, but if you hit him, that's child abuse and can cause psychological issues in your child. Same thing with flaming.
So, let's say your ADC just died to a Jax.
Constructive criticism: "Hey Jhin, don't 1v1 the Jax."
Flaming: "Jhin you fucking suck don't 1v1 the god damn Jax."
Now a bit more in-depth: -You may offer some ways on how to improve, if you know any.
Just don't type: If you don't trust yourself not to flame, just unbind your keyboard.
Credits to author!
Recognizing the difference between inting/trolling and a bad play
Inting, AKA intentional feeding: Sitting still and letting them kill you, running in to multiple people and dying, running it down mid, purposefully fighting multiple enemies while being underfed and being told not to.
Trolling: Buying useless items (Ex: Deathcap on Fiora), doing something to purposefully kill your own teammate, purposefully wasting summoner spells/active items, refusing to help your team, purposefully and repeatedly performing actions to ensure defeat.
Bad play(er): Often easily confused with inting and trolling, but they try to win and listen to advice. Key thing to look out for is that they don't repeatedly make mistakes, and that they still have a certain amount of team contribution (Ward scores, damage, listen to pings, teamfight)
Now a bit more in-depth: -Don't accuse people of inting/trolling right off the bat, after one mistake. -Not typing anything would be ideal, since trolls and inters usually want to provoke a reaction. -Flaming does absolutely nothing and just makes bad players more likely to int or troll, and get you a chat ban.
Encouragement and compliments: Boost team morale and snag yourself honors. Number one defense against trolls, inters, tilters and ff15 spammers.
Encouragement: If someone is doing poorly, offer them some small compliment on what they're doing well. They'll be more receptive to your feedback afterward. (Example: Ezreal has six deaths, but he's got a very nice ward score. You compliment him on the latter, and give him a tip.)
Compliments: A little goes a long way. If someone gets a kill, a quick 'gj' brightens everyone's day. If you're dead, you can cheer your teammates on!
Stopping flaming: If someone is getting flamed, it's always a good idea to step in and help them. (Just don't flame back.)
Address the situation: You don't always have to talk to the flamer. Just tell the player getting flamed to mute the flamer, and compliment him on his plays. They will have a much harder time justifying trolling or inting to themselves if at least one person (You) are nice to them.
Don't flame back: Just mute the flamer and stay positive. Even if you're the best person on the team, it does not give you the right to flame anyone.
Telling the flamer to stop: You can do this. It works better if you have a duo. Something along the lines of "Don't flame, it won't help ____ play better" shows support to the guy getting flamed, and shows the flamer you don't like what he's doing.
If all else fails, /muteall and stay positive.