Yusa was right. Hary was concerned with Ao's and Huse's fight. Once Huse loses, or the effect of the pill wears out, Ao will be free to slaughter the other members of his group. They are on a stalemate against their enemies. It is evident that even after eating such a pill, Huse was still on the losing side, barely holding himself.
As for his Battle with Shinja, he has somewhat the advantage. The difference in cultivation is very high, after all. If Shinja didn't open her Spiritual Energy Meridians and used her Pure Yin Body power and the Soul Technique, she wouldn't be able to hold Hary. This made Hary even more determined to kill. Someone with a talent like that must have a very profound background, something that his Cout Clan probably can't mess with.