A managers job is to buy players and get the best out of them, you can say in the last few years he has done that to a certain extent, but now he needs to pull the team together and get them out of this rut of bad performances and bad results, but he appears powerless to control anything.
This all started pre season and its Jan now, and its got worse if anything, if a manager cant control his team or influence their pattern of play then he is not doing a major part of his job.