I really can't see that he did anything wrong that cost either side the game.
If you mean the ref then he most certainly didn't. He was picky but consistently picky. Didn't make a bad decision all game but, of course, is not in step with his colleagues when it comes to making consistent decisions in this division.
The problem is I can remember when a mis-timed tackle from behind, a bit of a dive and "foot up" would have been, at max, a yellow between them. The older refs can also - but not the younger ones.