Over time, her hatred of her own family became a driving force for her. Nothing else could attract her attention. She didn't take any action against her family just because her family had significant influence in the United Federation.
If it wasn't for the System's restrictions that were imposed on her every time she harmed or had an impact on mere mortals, she would have destroyed her family long ago.
Her current strength was not enough to quickly and decisively exterminate the family. Apart from her, the family was able to attract several powerful awakened ones to their side, who, although not as strong as her, could buy enough time for the other Federation Heroes to arrive and overwhelm her with their numbers. While she would be limited by the System in her actions against mortals, they could take advantage of this opportunity and defeat her.
