Not really sure why it matters? Are you that upset you can't be on the top of a leaderboard that is utterly pointless and in the long run absolutely meaningless?
Botting has been around forever and at this point in the game they've removed any avenue that would allow someone else being that far ahead of you to negatively impact your game
auction house is gone
trading is gone
your individual experience is in no way dictated by outside forces for someone else botting on their account.
suck it up and move on.