Really bad insults
I've seen a lot of people getting annoyed when they're losing but today in my opinion some boundaries were crossed. The player in question is Aviralksingh. I have screenshots of the chat messages, but not sure how to link them here. Those are the links:
@ivanoffnba During the game, you can right-click on the players avatar. A menu pops down with the option to report this player. This way, the game and the chat is automatically saved and sent to the moderators.
(Other in-game options are block, mute or befriend).