total mental devastation

An immediate reaction to information taken in through one or more senses that is undesired which causes visible distress and discomfort.

Causes feelings of discomfort and disgust for long periods of time, as well as the inability to forget the undesired information.

May cause loss of interest, agitation, recurring feelings of discomfort and disgust, and struggling to communicate about the information, even when being vague.

The horror book had been too descriptive, and he said he is going through a "total mental devastation".