Was flamed by an extremely angry guy post game

So some time ago a guy made extremely inflammatory remarks that I feel deserve a report.

I know there is an in-game report feature which I used, however I believe there's a way to make a direct report. I looked around and people tell me there's a riot ticket submission I can use, but that just directs me to the boards outright.

Any help please?

Thanks.

Edit: How does thumbs down make sense? Unless this offends you somehow I don't understand what intelligent purpose thumbs down would serve. Other than forcing me to remake the thread because it's fallen behind with insufficient answers.