Answer:
Narcissistic personality disorder; Personality Disorder.
Step-by-step explanation:
Narcissistic personality disorder is a type of personality disorder in which a person needs admiration and lacks empathy for others. A person with such type of personality disorder is arrogant, proud, demanding and even at times manipulative.
Such type of people leads an unhappy life when they are not recognized or given attention that they need. This also affects their relationship with others in office, schools, or home. They also can not take criticism because they think that they only deserve appreciation. They are envious of others.
In the given case, Zachary is unable to take criticism and is envious of others' success. He is a daydreamer. The characteristics that he shows is of "narcissistic personality disorder".