The real problem is the lack/misunderstanding of Possession etiquette. This game was over by T13. Hell, by T17 you had more than half the VP in the kingdom! Still your opponent stuck it out for... what? Another 45 minutes and 16 effective turns?
I've played with microman and I think he's a nice guy, but his sense of propriety was misplaced here. Letting your opponent play out a winning combo might be considered polite, and fighting out a losing slog is at least tenacious, but dragging out a scorched-earth Possession game is just shabby.