Does the fact that no one has proposed to a 28-year-old university student from a well-off family, who is adorned with knowledge, lineage, beauty, wealth, and religiosity, indicate that her destiny has not yet arrived, or is it due to magic or the evil eye, or is the fault with her?

Everything is predestined by Allah, so you must turn to Him and show your neediness before Him, and exert efforts by searching for a husband and seeking help from others. The delay in marriage does not necessarily mean it is due to magic or the evil eye. However, if there is a strong suspicion of something abnormal, like magic, then one should be diligent in performing Ruqyah (definition) (Islamic exorcism).