Insufficient resources: If the university can't provide enough resources to support your academic research or career development, such as the lack of some necessary experimental equipment, books, software or financial support, you may be disappointed.

The quality of teaching is not ideal: If you find that the quality of teaching in universities is not as good as expected, or the teachers are not attentive, the teaching management is chaotic, and the curriculum is unreasonable, you may be disappointed.

Inaction of administrators or poor service: If university administrators can't provide good service, or don't actively solve students' problems in study or life, you may be disappointed.

Campus culture doesn't match your expectations: If the campus culture is far from your expectations, such as unhealthy school spirit, unhealthy style of study, and low quality of students, you may be disappointed.

Incomplete facilities: If the university facilities can't meet the demand, such as a small library, imperfect sports facilities and poor dining quality in the canteen, you may be disappointed.

Incomplete disciplines or lack of dominant disciplines: If a university doesn't have its own favorite disciplines, or its favorite disciplines don't develop well, you may be disappointed.

Inconsistent with expected social experience: such as communication with roommates, classmates, professors, etc. Failing to meet expectations, such as indifference and lack of communication, you may be disappointed.

Insufficient internship or employment opportunities: If the university cannot provide enough internship or employment opportunities, or the quality of internship or employment opportunities is low, you may be disappointed.

Insufficient mental health services: If universities can't provide enough mental health services, or the quality of mental health services is poor, you may be disappointed.

Please note that the above are some common possible situations, but not all universities will have these problems. If you are disappointed with your university, it is recommended to actively communicate with the school or seek help from relevant organizations or institutions.