The simple fact is, these "crab players" are criticised by some of their fanbase. Many United fans think Carrick is shit; up until he was the flavour of the month, Xavi was seen as a useless player at Barca (think about 3-5 years back) and even now guys like Barry get ripped.
The problem, is that their job isn't glamarous and entirely obvious. Goalkeepers save shots, strikers score goals, defenders/defensive mids win the ball, attacking mids get forward and help out. Possibly due to this, you can look at someone like Barry and wonder what the hell he does. He wins the ball every now and again, but apart from that, he doesn't do any of the above.
As he doesn't do any of the above, the criticism starts and then is picked up because people can't understand his role. This isn't a slight, I don't understand the fascination with Adam Johnson, who I believe to be a player who is 20 years late to make a truly world class player or at least needs a team plan built around him. He is as direct as you like, which isn't always a good thing and he is one dimensional at best.
Now, Capello and Mancini rate him, so they see something that I don't because of their greater knowledge, and I learn what in the coming seasons.
Also, I never understand people who criticise Ibra, who is probably the best striker in the world outside of Balo IMO.
Long story short, sometimes we look at players and just cannot 'get them'. I don't think that Lee was been a twat, I just thinks that he looks at Barry like I look at AJ and cannot see what the fuss is about.