How could i've carried this game?

So recently I played a game which ended in a loss, my Malphite got banned on his champion (Nasus) by Zilean, who was trolling because he didn't got his toplane. Further, they didn't know how to possition.. What can I do about it? Is it bannable/reportable? [Click here to see the game.]( I really didn't know how to deal with this. -Givifa
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