and so he continues to exercise authority over the "kingdom of the world" since he has never surrendered
Once again you open your mouth and we are supplied with a torrent of drivvle! Just because you never let get go of something (in this case authority) which has been taken from you it doesn't mean, and cannot mean, you still have it! When you put forward an analogy and self declare that it falls down because of this or that I have to shut down because you've only created a 'strawman' - not a reasoned response.
It beggars the imagination how JWs expect everybody to jump through hoops and circles to pertpetuate the idea of christianity as a complex thing and needs complex thinking. It's the magician's illusion - create a complex side-show and you'll miss the simple stuff. If the 'foolish and ignoble' were chosen in favour of the educated then why is so much of the doctrine ridiculously convoluted and complex.
One other point, you simply can't have a remnant at the beginning of something... it can ONLY be at the end of a thing! There was no remnant in 33CE - the Remnant, as you call it, could only occur in 1914/1918/1919/1933/1935 and that assumes the JWs are correct as much of it is speculative chronology combined with twisted, warped self-promoting reasoning.
If we have this superior rule taking place within the organization then we should expect there to exist a Spiritual Paradise... that presupposes all are safe within this Kingdom rule. If that is the case, why is there so much harm and injustice within it's confines? If you deny there is harm then I should suggest you interview those who have suffered at it's hands. This is not a strawman argument - it is evidence as the to existence of the whole establishment of the Rigtheous Estate - one which pertains to a Spiritual Paradise; one that JWs say exist because of the King's Authourity having been given to him.