Anfield humiliation under Valverde - players blame themselves
Bayern humiliation under Setein - players blaming the tactics
And that's the sole reason why Setien should be preferred over Valverde when this question is posed.
Spoiled entitled kids do not want to train or work at all, and they had their perfect person to protect them: Ernie.
When someone asked them to follow instructions and work, they rebel and kick him out of the club.
Hopefully with Koeman taking no shit from anyone, and the (otherwise cancerous) board backing him, their whining will result in them watching from the stands if not forced out.