Misexpectation 

To have the incorrect perception of what the outcome of a situation should be due to missing the main idea or key points defining the situation.

The overlord has serious misexpectations for the play, he thought it was a comedy beforehand when it was actually mystery.

Misexpectation by Vocabulomorph October 22, 2015

Disexpectations 

The feeling of not ever living up to an expectation or standard from a person of higher authority. The pressure becomes more excruciating than ever before, as one constantly tries their hardest to persuade the higher power of society that they are NOT worthless or inept of talent, but that they have that untapped potential of becoming exceptional. Unfortunately, the higher power strongly denies that this person made a change at all, and still views the person as one who will never grow or change. The pressure from this higher authority are like rain drops on the poor person's head, and at this instance, this person is in a tropical storm full of doubts and disexpectations. The character struggles to find a solution, because a solution with this higher power is about as probable as a pig flying from his constricted pen to the beautiful, free world. The character wants to be like the pig, and escape from the grasps of the higher authority. However, he cannot, because of his many disexpectations .

Because of his many disexpectations from the Baltimore Ravens, Joe Flacco has been constantly doubting himself, leading to his low self-esteem.

Disexpectations by amath80 August 27, 2018

Mexpectations 

Hoped-for perks and pleasures of visiting our friends to da south.

Looking forward to fun 'n' games in Tijuana is perfectly fine, but please realize dat loads of other tourists may have similar Mexpectations, as well, and so whatever delights you're going there for may be either very pricey, in short supply, and/or only accessible after waiting in line for extended periods.

Mexpectations by QuacksO December 11, 2022