What to do?

I just played a game ( ADC ) and i got camped bot ( Which is usual so i don't really care ) but i had a teemo sup and he just fed, and let me die. He kept letting me 2v1 while he sat in a brush and then flamed me when i die. He then started telling people to report me on both of the teams, and they couldn't see he trolling me. He made everyone ( mostly ) in the game report me/ Flame/ Blame me. I just need to rant as there's nothing that will be done.
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