Mute is the best solution. But I think I understand what you’re really getting at, which is the underlying toxicity that causes these behaviors in the first place. I’ve been having the same problem in GTA Online a lot. It really bothers me too, and I wish more people really saw it as a problem and did something about it, instead of, “Mute and Ignore”. I realize trying to change someone’s negative behavior is not our responsibility, in and of itself, but we can’t ignore the overall effect it has on our gaming community.
One person on Reddit told me this: “Be the change you wish to see in the world.” If you have a mic, or you’re on PC and have the chat, do your best to treat everyone as equals and lift them up as much as possible. Try to foster an atmosphere of camaraderie. Its possible that that person might have just had a string of really bad matches, and is already frustrated. The most important thing is to not get frustrated, or respond to their hostility with mutual hostility. This includes sarcasm as well. Ask them if they have any ideas or suggestions, or any strategies they want to try. Try to help them feel included, and like they contributed. Treat them like a mature human being. And if they have ideas and strats, try them. Annnnd, if it drags the team down and you guys lose, remember that its just a game, and there’s always next time.