The concise version is ...
when a journalist posts that RM lost the dressing room a long time ago after you've been humiliated 4-0 by your bitter rivals
when a respected player who isn't known as being impulsive or brash says publicly 'there is no chemistry in the team'
when your 20+ striker wants to leave
when one of your countries best young players is refusing to sign a new contract while your current manager is in charge
when your team doesn't know how to defend
...... when that happens you know the manager isn't going to turn it round.
We just need someone better than Martinez who the players want to play for.