I honestly don't mind Tatsuya being OP, I enjoyed watching it.

I'd have to go back and watch through to be able to say which episode though I can, of the two Shibas, Miyuki is daughter of the head of the Family as she is the heir. Tatsuya is both scorned as well as considers the head of the family "Aunt". He also has a underling of the Shiba family for a father.