Remember that he plays essentially every week as well. You really think he's going out there week on week, repeatedly doing the same "awful" things, yet staying in the side almost all season? He's obviously given instructions on what to do by the manager, and he's clearly following them well enough to warrant his selection. It pays to remember that what you see, as a fan, is 90 mins worth on a Saturday afternoon. What happens then is a product of a whole period of training geared towards that 90 minutes, so he obviously does well enough in the eyes of those that matter.