Phalaenopsis Root (?) Problems

[Arielinwonderland]

two or three of my Phaelanopsis plants have been struggling lately. They had a mealybug( ) infestation, but I was able to get rid of the tiny fluffy demons.

Based on what I read, I found that the issue had to be with their ability to take in water, and figured that their roots had to be suffering.

I did my best to determine which roots were healthy and which were dying, but apparently there is ambiguity between healthy/dying roots- which doesn't even make sense.



After all my effort, my plants seem to still be in decline, and I'm wondering if anyone could figure out if I'm missing something obvious/ if these darker root areas are symptoms of a fungal infection/ if repotting was somehow too stressful for my orchids.

they all seem to be displaying similar symptoms: