Yesterday I was put in a gambit match with someone three matches in a row who was using an afk bot. I messaged him to tell him I would be reporting him. After the third match he then messaged me back calling me a whole arrangement of names and telling me he's being doing it since day one and that's he's untouchable. He then commented of my screenshot of the match proving he had 0 involvement calling me a slave. There must be a more direct way of report these people to Bungie.
Hopefully they look into the guy. They're starting to crack down, so he's not as untouchable as he thinks. This may give you hope: https://www.bungie.net/en/Forums/Post/252916041?sort=0&page=0