unsympathetic (to/towards something) not in agreement with something; not supporting an idea, aim, etc. The government was unsympathetic to the needs of the poor. (of a person) not easy to like; unpleasant opposite sympathetic

Unsympathetic means not sharing the feelings of someone or identifying with, caring about, or having any favor or support for someone or something. It’s the opposite of sympathetic, which most commonly means having sympathy —having the same emotions as someone else, especially sadness.