Antonyms for the phrase "being of assistance" might include hindering, obstructing, or impeding. Other antonyms could be ignoring, neglecting, or refusing to help. In situations where someone needs help or support, refusing to be of assistance can have serious consequences. At work, an employee who fails to be of assistance to customers or colleagues may be viewed as unhelpful or uncooperative. When people need help, they often rely on others to be of assistance, and failing to provide that assistance can lead to frustration, anger, or even harm. Therefore, it is important to consider the consequences of our actions and strive to be helpful whenever possible.