On the basis that the Sky highlights showed the penalty shout for the trip on Browne and the numerous inconsistent decisions, I gave him a 5. It could have been lower. He was just not observing play the way it required. He let some things go, others resulted in a foul or, worse, an inconsistent card.
He was also very irritating in his insistence that nothing restart until he was ready, in position and had blown his whistle. His assistants did not give him reliable help either.
It spoilt the game to a degree but also allowed some fairly unsportsmanlike behaviour (on both sides)