How is it my fault you lack any emotional control, exactly? I'm not saying it's okay to harass people, but it's not the harasser's fault that you get upset. Here's an example.
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Nin10do0014, you are a complete fucking Silver scrub. 0/9/14 last game!? How do you even die 9 times as Leona? You're fucking terrible.
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Actually, I changed my mind. Nin10do0014, you are a complete Silver God. 59% win rate on Jarvan over SIXTY games? That shit is so pro, you'll climb in no time.
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...now, how do you feel? The correct answer is "the same as before I read that", because it means absolutely nothing to you coming from me. No one can control how you react to them, so you can't blame them for the way you reacted.