So...your father was functional, albeit with slight the slight discomfort of auditory hallucinations. You had him hospitalized (why?), where he was put on major tranquilizers and ECT, which ruins your memory. And now you're wondering why he isn't the same. Well, he's on major tranquilizers that prevent cognition, probably suffering from memory loss, probably traumatized from forced imprisonment, probably feeling betrayed by his family (if he can feel anything), probably incredibly fearful and mistrustful of you... He might be fine after six months to several years. Meanwhile, you suck and should feel bad for violating your father's free will and putting him on debilitating drugs. Hope you choke.