Marbury's minutes are wasted minutes that digs the team into a deeper and deeper hole that the other players have to overcome. The longer he plays, the bigger the hole.
He doesn't know how to defend. His hustle is false hustle, and he's shooting 25%, with turnover after turnover.
It isn't working. Eddie House isn't the greatest ballhandler in the world, but he turns it over less than Marbury, and at least Eddie can make an open shot. Marbury can't even hit the rim half the time.