It's just a game, but his attitude is pathetic, that's what it boils down to.
Exactly on the latter part, I literally has had a mafia game made just to prank moi by on another forum, everyone else was on it(shortlived, 2 days since it can't done for long), and it was funny because it was twilight zone level wtfness how elaborately irrational everyone was towards me, left long line of bread crumbs that made super suspicious, little hoax to joke with one person done in good humour.
Now this one is a narrator who is in absolute position of power and with the trust that comes with it, deciding to do this on 19 people all by himself? There is nothing to it but utter stupidity. Zero humour or anything else . Just annoying everyone involved.