1. Lack of goals and directions: In college life, many students may be confused because they don't have clear goals or career plans. They may not know their interests and passions, or have a clear understanding of their future career path.

2. Academic pressure: The pressure of studying in university may make people feel disappointed. Course difficulty, workload, test pressure, etc. It can be stressful.

3. Interpersonal relationships: Interpersonal relationships in college life may also be disappointing. For example, you don't have a good relationship with your roommate, or you can't find real friends at school.

4. Economic pressure: For many students, college life is also facing economic pressure for the first time. They need to pay their own tuition and living expenses, which may make them feel stressed and disappointed.

5. Self-awareness: University is a process of self-discovery and self-awareness, but this process may make people feel confused and disappointed. They may find that their interests and abilities are different from their expectations, or feel uncertain about their future.

6. The gap between expectation and reality: Many people have high expectations for college life, but the reality may not be as good as expected. For example, they may expect college life to be full of fun and freedom, but in fact they may have a lot of academic pressure and responsibilities.

7. Adapt to the new environment: For many freshmen who go straight from high school to university, it may take them some time to adapt to the new environment and lifestyle. This may confuse and disappoint them.