.report in-game and then post here with the PUG link AND rounds/ticks where its easy to spot grief/cheat.
Can you point out the rounds/ticks for this guy? I watched few rounds but probably I missed the ones where he was griefing.
Banned for griefing.
Its a hard problem to automatically detect griefers as its a very human problem. The only way is for you guys to report with exact rounds and we give them grief ban.