hey i dont know how to report people but today i ran in to the most blatant farming i have ever seen, first room on the multiplayer list had GuyNR1s,GuyNR4 and GuyNR1 in it and GuyNR1 had a long row of wins under his name. i told him he was being stupid and he proceeded to tell me to stfu and that he was sexy

First, take screenshots.

Then go on the forum and look for dark teal names, on the forum leaders. They're also called GameMasters.(GM)

You PM the one you chose, then you tell him the story, then place screenshots.

He will take care of the rest for you.

Good luck.

If you don't have any screenshots, your case will not be taken care of.

Before you do what the previous poster suggested you may go ahead and ask in #support.
Access #support by clicking on the help button at the top.
Usually there are some people active who can handle reports fastly.