what Barry supposed to do is win us the ball and then pass it to a player near him who will think about the way of moving it forward. His partner in the midfield is usually McCarthy, who is also a DM and doesn't have the ability of passing the ball in a 'proactive manner', so they end up passing it around until the opposition takes the ball away from us.
Is it Barry's (or McCarthy's or Besic') fault that have to play alongside each other? They don't pick themselves mate.
Martinez said that he's looking for a creative player so if he can bring him and then play him with Barry then maybe Barry won't look 'useless' and 'done' to some fans because today he showed that he's still fine when it comes to doing the work he's supposed to be doing.