It's a difficult one this, whilst some referees are seriously out of their depth in the Premier League some of them are very good and do make the honest and genuine mistake, but, it is then admitting it that many struggle with.
The likes of Stuart Atwell and Michael Oliver, no disrespect to them, but personally I think that they are too young to be PL referees, 29 and 25 respectively. I think the high profile blunders in recent seasons support my comments on Atwell, and also his obsurd red card for Cahill this weekend at WHL.
The main issue with why people consider the referees to be poor is because, as previously mentioned the extent of the media coverage, and now it is becoming more and more of an issue, more so than some of the actions of the players, that often, referees let go unpunished.
As a referee if you make a big error you are dropped from the forthcoming round of fixtures, some are even demoted to the Championship for a short period (Andy D'Urso is a good example).
The problem isn't helped, like last night, that the Suarez offside goal wasn't the referees fault, but that of his assistant. Yet, it is he that everyone comments about after the game. The same is said for the Newcastle penalty at Old Trafford the other week.
That said, sometimes players dont make it easy for themselves, and the diving, cheating, going down to easy etc of certain players means they have a reputation that, although shouldn't, will stick and make an official think twice about making, what would be the correct choice.
As a referee myself, admittedly nowhere near the required grade to officiate at PL level it is sometimes hard to get every decision correct, after all, we are only human. However, where I can, on a Saturday or a Sunday morning speak to the managers/players after the game and explain my decision, the professional referees aren't allowed. Personally I think this is wrong, and whilst yes, I agree that they shouldn't have to provide a statement immediately following the game, if it is fear of media punishment, they should have to provide a statement response via an appointed spokesperson.