So I was browsing the RMT section and I noticed that someone who is new asking a question. So I replied to her/him rating his team. I noticed so-called expert player was being very mean and swearing to him/her (the swearing part was to me) and I got very angry. I want to report him because of how mean he is to the new player.
EDIT: Squaaaaaaaw told me i should not say usernames in public so i got rid of it
There is a report feature. It can be found here. Make sure you read and follow all of the rules on the page before reporting, and it also helps to have screenshots of offenses for evidence.
I hope this helps!