I haven't played in a while, but if I made a goof and started getting ripped for it, I would just agree with all the insults. "Yep, I'm the worst." "I should be bronze level." "I'm always carried by the good players." "Yes, I should just die." The trolls hate that.
My favorite is when they miss or don't even attempt to get the 5 centered balls you dropped right in front of the opposing teams goal, but you're responsible for the loss even though you also got 4 saves.