I think the decision not to issue a red was the worst. Sometimes those handballs when a shot or cross is blocked are difficult to judge in real time, but he gave a free kick when Perez was in a clear goalscoring position, but only followed it up with a yellow. It wasn't the most aggressive foul you'll see, but it was clearly deliberate, and the red card should have been automatic regardless.
Was that not a yellow because of the changes to the laws over the summer?