Saleen used violent means of taking the halls apart. While it was very crude, it had gotten Agares flustered. He wanted very much to stop Saleen, but it would expose him.
The simplest methods were the most difficult to deal with.
Agares was able to do nothing but watch Saleen take the halls apart, bagging everything into his space equipment. Even though Agares only wanted anything useful to assassins for himself, he felt a heartache. If he sold all of the material, it'd have made the royal family far wealthier than the local nobles.
Even in their current state of affairs, Qin still had more than one-third of their nobles under control. Agares' royal family, however, only held sway over less than ten percent of their nobles. It would be a lie to say that he felt nothing about their state of affairs. He would not have dumped his position of emperor to his brother instead of being one himself after all.