Except that - your hyperbole aside, no one “killed the patient”, we do still live in a constitutional republic, we haven’t lost the right of self-determination, and no one appointed anyone as a “little King George”.
Other than that I would tend to agree ;-)
We don’t live in a constitutional republic anymore, at least not one based on the US Constitution. That defined a government composed of sovereign states, with a federal government of limited, enumerated powers, derived from the consent of the States. Such a nation no longer exists, except perhaps in your imagination.