Wayne Rooney has admitted that one Manchester United legend was a “nightmare” and didn’t speak with two former teammates for “months” due to arguments. The 38-year-old former Manchester United and England striker, who has been out of management since January, had a prolific career during his time at Old Trafford. Wayne Rooney hoovered up the major silverware during his legendary spell at the Red Devils, including five Premier League titles and a Champions League trophy. The United legend, who also lifted an FA Cup, three League Cups and a Europa League with the Red Devils, left Old Trafford in…