If a person is dissatisfied with your performance in every aspect, it indicates that they have a core dissatisfaction that is significant but difficult to articulate. This dissatisfaction is either due to a lack of legitimacy or is hard to express, making it impossible for the other party to address it directly. Instead, they will convey their feelings through a series of seemingly reasonable yet trivial grievances. For example, the other party may choose to focus on minor details, such as slight flaws in work processes or differences in lifestyle habits. By repeatedly emphasizing these types of dissatisfaction, they maintain a facade of reasonableness while indirectly expressing their true needs that are wrapped in criticism.