1. Expensive courses: case western reserve university's courses are very expensive, which some ordinary families can't afford, so its enrollment is limited.

2. The school's infrastructure is relatively backward: case western reserve university's infrastructure and equipment are relatively backward, many of which can't keep up with the development of the school and fail to provide a good learning environment for students.

3. Limited social interaction on campus: Due to the limited number of students enrolled in case western reserve university and limited social interaction on campus, students cannot have rich exchanges on campus.

4. Different teaching quality: case western reserve university's enrollment standards are very strict, but the teaching quality is sometimes good and sometimes bad, and there are few good teachers, so it can't provide guidance and counseling for students.