There are many synonyms for the phrase "antisocial sentiments", which refers to someone who exhibits a lack of respect for social norms or other people's feelings. Other words that can be used to describe someone exhibiting this behavior include "misanthropic", "reclusive", "withdrawn", "unsociable", and "solitary". Additionally, someone who displays antisocial behavior may be considered "apathetic", "disdainful", or "disrespectful". These words are all useful for describing someone who may struggle to understand or connect with others, or who has a negative view of society as a whole. However, it's important to remember that these words should be used with care and sensitivity, as exhibiting antisocial behavior may be a symptom of a larger mental health issue that needs proper attention and care.