It happens often enough, someone griefs during the game. After the game they add you as a friend to rant. I usually ignore these requests, but the other day I accepted it in the hopes of having a discussion and hearing them out. But alas the worst does happen- I add them as a friend and they go from grieving (but discussing) to an all out abuse before blocking me.
Is there a way to report such behavior and flag the chat? I cant go back to the match history to report them nor do I have access to the chat to flag it down. There has to be something players can do to report, other than being helpless and let toxicity go scot-free (other than ignoring the friend requests in the first place).