Yes the main problem is the board but you kind of see a pattern here already with the senior players. They clearly don't respect Setien and his men and I don't care how right the senior players were in their disagreement with Setien, it was plain wrong for them to behave like they did, openly ridiculing and humiliating Sarabia and Setien. That was just not right.
Each and every team has senior players.
If the team consists players around 20, then the remaining "old" 23 years old becomes the "senior".
There is always a sort of hierarchy in the locker room and you can't avoid that.
Nonetheless, as I have already mentioned that in this forum, football is NOT military service, it is a creative GAME, where the admirals do have the authority, but RESPECT is not part of it.
Respect needs to be earned and cannot be forced upon any player.
If Setien or Sarabia weren't able to earn that, it's their fault and problem, the players are human with strong egos and relati8vely childish considerations in the bag. Either the coach is able to handle that or he is not capable.
There is no worse football team than an artificially disciplined one, scared to express their true feelings...