How should i treat bad players?

I m G1 for the 10 th time this season and every time i try to reach plat i get a bunch of monkeys. Last game a KAyn got form in 23 min, an ezreal inted and could not def nexus turrets, i got a Yi that could not play the champ and i mean if you can not play Yi your IQ is lowest of the low. It is getting so frustrating, i have to play with these people every game. So every time someone is trolling i flame him hard, because i can not stand this shit anymore instead of games getting better they get worse every fkn time. So what do i do instead of flame? How do you treat people with negative IQ in order to listen to you and stop trolling your games?
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