Help me!

So in the majority of the games I play on League, I end up with some serious lack of understanding of the game or major toxicity. The match attached here is just one example, I played as in the awesome new gamemode, Black Market Brawlers, and afterwards, was yelled at by two members of my team for stealing kills and just cleaning up. I was sarcastically told I was "good" because of those two things. I attempted to explain to them that I was securing the kills for our team when I knew no one would be able to catch up to the low-health enemies. I proceeded to point out the damage to champions statistic, a category in which I lead our team. However, they continued to insult me and tell me how my match history and rank proved how bad I was. I am currently Silver 5, and two bronze players were the ones telling me this, so I'm unsure about that... I also don't think my match history is half bad for how unskilled I know I am. In the post-game lobby, I was notified that I had been reported for verbal abuse. And according to my teammates, I was reported by multiple players. Anyway, I was hoping I could get suggestions from you guys on things I can say to players like that in the future to try to improve the feelings left after the game ends. I would like to specify that this is in no way lashing out at an yone in specific, I've had bad days too where I was toxic, I would just like to hear your ideas on how to make friends rather than foes. Thanks for helping out!