The Daily Mail says Koeman's hardline approach has upset many inside the locker room.
Whereas former manager Roberto Martinez would let players and coaches queue up together in the canteen, Everton's first-teamers now have to wait until Koeman and his staff are served before they get their food.
What may seem like a minor issue takes on significance when morale is at rock-bottom and players feel aggrieved at being treated like schoolkids. Koeman has always given his brother Erwin the responsibility of taking training sessions while he stands apart until a correction has to be barked out. He has variously accused the team of lacking passion, aggression and self-belief this season.
Young midfielder Tom Davies described his manager as 'tough and demanding'. He didn't mean it as a criticism, but others aren't as charitable.