A general sphere of a break down of some sort is when one is manipulated to such a degree that one cannot see objectively. Therefore what the other says defines how you view yourself and your work, and they can make out your identity and work is flawed and needs to be improved their way. Just because they say so. Just because they want to take you down a track to fulfill their agenda.
Now, to you, they know better and do the thinking for you–and maybe you don’t even know it. Now, they have manipulated you to such a degree that you get to this point. One maybe aware of such manipulation but cannot do anything about it anymore. They have taken over your mind. However, you may even be automatic. And you may even be happy automatic. What a state to be in caused by manipulation. It happens in thrillers, the genre of entertainment that is, but to some similar degree it can happen anywhere. The horror. But, as in a thriller, there is the struggle to retain one’s sanity.