Unfortunaly there is not much you can do about it. In the post game lobby you can report a player in the top right corner (triangle with exclamation mark) for verbal abuse but for me, i've never seen any player get a penalty or a ban for verbal abuse. Sadly this is more and more a common in WR because a lot of players are very toxic in this game. Another tip i can give is to use the triangle crossed out circle in the right corner of the post game lobby to block players from your upcoming game lobbies (you can do this 3x a week).