An angry student walks up to his teacher, in class and challenges him to a duel. Shouting insults, "You're an old fool! You have no strength left! I will strike you down in one blow." But the teacher ignored him, and continued with his lesson, and when class was over the student left defeated and deflated with nothing. Another student approached the teacher when all the other students were gone and said, "Teacher, why did you not take his challenge, why did you let him insult you?"
The teacher responded, "If someone brings you a gift and you do not take it, To whom does it belong?" The student thought about it, and replied, "It belongs to the one who offered it." The teacher said, "It is the same with envy and insults: If you refuse to accept them, they belong to the one who offered them."
Don't accept the toxic remarks other summoners make. Do not even respond to them. Anything offered and rejected, belongs to the person offering it.
You have NO power over others actions. Only power over how you react to them. If you ignore and do not respond to those who use words like the OP mentioned, then in the end, they are calling THEMSELVES those words. While it may be hurtful to HEAR, or SEE, you can remove the power from the words TOWARDS yourself and give it back to them. The old "I'm Rubber you're glue", that you all heard in elementary school was taught to you for a reason. That reason, is because it really does have power. It is the power of your own mind.
I fully agree, the words the OP mentioned are hurtful and people should not use them, and you are welcome to report them after the match. But getting your feelings hurt and acting like YOU are a victim because someone used those WORDS, on the safety of the internet, is in itself, just as childish and JUST AS WRONG. And I myself am a gay man, whose two closest friends are gay black men. And neither one of them EVER gets offended when those two words the OP mentioned are used.
The point I am trying to make is this, and it is fairly simple. TWO WRONGS DO NOT MAKE A RIGHT!