What feeling was expressed regarding being treated unfairly?

The feeling expressed regarding being treated unfairly centers around disappointment about returning to a previous role. This highlights a sense of dissatisfaction stemming from not progressing in one’s career as anticipated. When someone is returned to a previous position, it can evoke feelings of regret and frustration, especially if they had invested time and effort into advancing their career or taking on new challenges. This situation reflects a perception of being unfairly sidelined or overlooked, potentially leading to feelings of inadequacy and questioning one's value within the organization.

The other options reflect different emotions that may not directly address the concept of being treated unfairly. Frustration over flight schedules relates more to logistical issues rather than a perceived unfairness in career progression. Sadness about missed opportunities, while related to personal aspirations, doesn’t encapsulate the specific workplace context of being reverted to an earlier role. Anger over management decisions pertains to specific actions or choices but doesn’t convey the personal disappointment of returning to a less favorable position. Overall, the focus on disappointment captures the emotional weight of feeling unfairly treated in a professional setting.