I feel sorry for them. Emotions run high in football and no matter what they do there's usually one side or the other calling them useless, or even implying they're biased to one team, which is incredibly disrespectful as it calls into question their credibility as a ref and belittles all of the hard work it's taken to get to where they are (especially for the refs in major leagues) It's always said so casually as well, as is calling certain refs fat or old. Funny really, fans get up in arms about the slightest criticism of a beloved player, yet abusing refs is apparently fine. Guess that's tribalism for you, it tends to warp a person's morals.