My Advice on how to deal with toxicity.

/mute all Turn your pings down leave the fountain Go to jungle entrance Go to Lane Don't say anything in chat. Just Ping MIA, and danger pings (the red one) I have my Danger Ping set to 'V'. Ping Enemy Sums and your Sums ONLY, and do it ONLY when it is safe to do so and you feel it would be a good thing for your allies to know. Also, in chat say Zed R F Ign and ping it etc. Also try to shy away from the Ping Assist Button, and Spam Pinging. I always just assume people have their abilities and sums up, or I try to. Just focus on your own gameplay, and try your best. Also NEVER, EVER put your trust in other players. You gotta be the one that carries. If you lose, just think... "Faker woulda carried... I just need to get better at the game."

Oh ya and also something to add is just don't say anything ever in Champ Select. I never say anything I just pick my champion/role. I mean, if you are going to trade then sure just say, "Ya, I'll 'X'". don't say sure or anything like that, people might take it the wrong way.