Staff member didn't even read my ticket

So I made a ticket about a player that queued as a TANK but then ended up being a DPS looking for a quick dungeon... We wiped a lot as you can imagine and no one wants to kick him because you wait to long to find tanks. Half my gear got broken in the dungeon and a dungeon that should take 10-15 minutes took me 40 minutes because he can't hold aggro and has no defensive capability.

I made the ticket with screenshots to report this as it should be exploit or something in that line but the response I get from the staff member says that I have insufficient evidence to report this person for ninja looting.

Now I know staff probably gets a lot of tickets everyday but at least look for some key words so you can see why someone made the ticket.

Screenshot of the reply:
https://imgur.com/a/1MwcCue