Oliver can't have been too bad, as there are only a few posts commenting on him. I thought he was OK, with nothing really to be alarmed at. It wasn't a dirty game, and they didn't get near our box that often.
Regarding referees blocking our passing lines, they are a legitimate part of the game. It is up to us to take their positions into account during play, and arrange our play accordingly. They are under no obligation to move out of the way. They generally patrol the same diagonal, to get a good view of play, and position themselves to be able to react to the ball moving in either direction up or down the pitch. Our players should know where they are, and should be able to adjust accordingly. I don't think they deliberately try to disrupt our patterns of play.