Unsympathetic treatment can be replaced with a number of synonyms, including harsh treatment, callous treatment, insensitive treatment, unfeeling treatment, and uncaring treatment. When someone is subjected to unsympathetic treatment, they may feel marginalized, ignored, or even ostracized. This type of negative treatment can be damaging to a person's emotional and mental well-being, and can have long-lasting effects on their relationships with others. It is important for people to be aware of the ways in which they may be treating others unsympathetically, and to make a conscious effort to show more empathy and kindness in their interactions.