Someone threw in my ranked game. What should I do?

A lux player threw because I made one single mistake and died in his lane. "Uninstall, kys, All: this kha fed my midlaner i cant do this report me if you want to" these were his lines throughout the game.. I don't feel like reporting does anything, though my team and me reported that lux. My question is, "What's the best I could do against the throwers?"
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