Maybe it's not the referees but the rules which are grey or change every year. In addition, a bunch of wankers keep putting shit of referees no matter which way the decision is made.
e.g. When I started watching the game, forward passes were easy to tell, if it didn't go back, it was forward. Now, backward out of the hands but going forward, line balls, "looks forward but isn't" makes it impossible for referees to call forward passes. How is a referee supposed to tell forward passes at a lightning pace when he's not looking for the ball to travel forward but trying to remember the players' hands.
That's just 1 simple RL rule. Now, with even more complicated things like holding down and wrestling, it makes the Refs job impossible.