First of all, I want to emphasize that a mother's preference for her son is not a normal phenomenon, which may have a negative impact on family relations and personal mental health. If you feel that you have been treated unfairly as a daughter, you can consider the following ways to deal with this situation:

1. Communication: Try to have an open and frank dialogue with your mother and let her know your feelings and opinions. Don't complain, don't blame, try to understand her thoughts and feelings and seek solutions.

2. Self-regulation: Although you may feel dissatisfied or hurt, try to remain calm and rational and avoid making impulsive reactions. You can find a safe place to calm yourself down, do some self-reflection and adjust your mood.

3. Seek support: If you find it difficult to deal with this problem, you can seek support and advice from other family members, friends or professional counselors. They may provide you with different perspectives to help you deal with your emotions.

4. Understanding: Try to understand your mother's situation and thoughts. She may have been brought up in a patriarchal family environment, or there are other reasons why she prefers her son. Although this is unreasonable, it may be helpful to try to see the problem from her point of view.

5. boundaries: if your mother's behavior makes you feel unacceptable, you can set your own boundaries. For example, you can decide not to respond to her quirks or reduce your contact with her. This does not mean giving up the relationship with her, but trying to protect your feelings and health.

In short, as a daughter, you can take various measures to deal with your mother's eccentricity. It is important to remain calm, rational and respectful, and seek appropriate support and help.