By Nathan Ridley Erik ten Hag has refused to give his struggling Manchester United stars more days off and make their training sessions easier, it’s been claimed. After Mirror Football exclusively reported last week that Ten Hag was facing a dressing-room mutiny, the United boss is said to have faced a number of complaints from members of his squad’s leadership group regarding their workload. Some players are reportedly unhappy with the intensity of training sessions, their lack of rest days between matches and their inability to smoothly plan time off. The Red Devils’ leadership group include…