If players is treated in a injust way than the players should argue to the coach and they have a right to argue. Professional players can't be treated like amateur players.
Some big teams' coaches say that they need a power to control the players so they could make their team best. As an example, at EPL that is Manchester Uniteds home leagueManchester Cities coach Rorncho Manchini and a world class plaer Carlos Tevez had a problem with relationship because of Manchini's rude attitude. After the fight, Tevez said that Manchini treated him like a dog. So he was very mad because of Manchini at the match with Bayern Munchen, and he refused to play. Manchini forced him to to play so he ran away from him and even didn't participated at the training. Then the star player Tevez was moved to the minor team he tried to transfer to another team. However, Manchini and Tevez later made peace. There can be a happy ending like Tevez and Manchini's case. But there can be a dark side. Than when it happens players should obey the coach's order Like this case there can be a unfare rulling between the coach and the player. Than like my example the player's should refuse the coaches order to solve ths problem. the players must have right to argue coach's bad attitude and problems.
Second, there should be a law or a rule that can solve problem. As an example Korean professional soccer club jeju united had a p-roblem.coach Altool ordered the players to do tough training ang also treated players like soldiers. Also he didn't hear players adviceabout formations. The teams captain D.S. Lee argued to the coach Altool about formations. The coach tookoff his captain arm strap and gave it to another player.
So the players at jeju are being quiet to the coach , and Lee.D.S. doesn't have injury but he is in a release danger. Why? because of disobaying Altools order. It's what happened in Korea also it was on the news but government doesn't access it. To make K league better I think there should be a law or rule that can protect players and can punish the coach.
Manchester United's coach and players doesn't have these kind of problems and they will be forever.