1st of all you could not take the hud into consideration at all at 1/2c except for the sole purpose of dividing players into nit fish and fish, make no mistake, they are all fish, regardless of their preflop stats. 2nd, flop 3bet is horrible, you have 0 fold equity oop etc, a standard fold is best and as a side note i'd check fold a flop like 862dd, heck you might even c/f this, the only reason for betting being the fact that you block some combinations of higher rundowns and you have the king of spades which may help you to bluff on a spade. 3rd, the turn bet is a mistake, clearly a card far better for his range since he capped his value range by just calling your flop 3bet ( skewing his range heavily towards drawing hands) and even if he didn't have that many straight now, there are 2 fdraws out there, a ton of 4 card straightening rivers and you block none of it, river is fine i guess, he won't fold J9 ever maybe not even a flush.
I did not read your reasoning since it's a wall of text and im a bit sleepy but i feel these are the points that should be made about this hand. Hope this helped :)

You're welcome :P