Actually you can mute single people.
Yeah, you can just right-click on a player and either hit "mute" in the browser version or "Don't show player's messages" in the desktop client. You can do the same in the Lobby Chat but it's temperamental and not always working as it should.
Unfortunately, this kind of behavior exists on many platforms and not just on SWC. Some players just can't resist using insults or racist language. That's why I avoid most chats on platforms like SWC etc.
If you're a man and you allow yourself to get triggered or upset by anonymous online posters - you've got a lot of work to do. Unpopular opinion, but we are ultimately responsible for our own emotions, not our surroundings.