It's frustrating that muting is the only solution
The only effective solution to handle toxic players is... well, muting. And moving on. It's frustrating to say, but interacting with toxicity often makes you toxic as well, and You are at the risk of getting banned, because the system does not care who started it, but anyone who is involved. Which is perfectly fine. Muting is the best solution. People who have played for a long time are numb to toxicity, it only tilts them (so they mute and move on).
But I don't like it when people hurt from toxicity talk about it on the forums, and half of the replies are "you could have just muted." They are right, but they also miss the point. Just because there is a solution doesn't mean that toxicity is not bad.
With that said, if a person asks me what the best solution to a toxic player is, I would say muting. And that is frustrating in some ways.
"ok."