(edited by Moderator)
Kicked at last boss - Griefing report
This isn’t the best place to report things like that. You better use ingame report or contact support. I believe there must be an email address to report it too but I can’t recall it for sure now.
You aren’t allowed to name and shame on the forums. You can, however, contact CS with proof, if you have it, and report there. Or use the in-game tool. Good luck.