How it works in the corporate world:
Whether we like it or not, corporate world is the real world. Though not the ideal world.People are nice to you only when you are influential or they need you. Once the need or influence changes, so does their behaviors to you.It is that simple .Promotions are not entirely linked to performance. At best they are linked to the perception of your performance.Do not associate your self-worth to your position and performance in the company.
This is how it works