Hi DankTankerous.
I skimmed through and the 1st couple of pages.
My guess is you needed to take a knife to the roots when you transplanted in post
#18
The roots in that picture have a great color.
When a plant is that rootbound and you put it in fresh soil the way it is the water can sometimes have an umbrella affect going around the root ball and the water may not penetrate into the root ball choosing the path of least resistance.
More info can be found doing a google search for "transplanting a rootbound plant".
Someone tried to call Hot Rod Harley over, to do that the @ symbol is needed.
@hotrodharley