My favorite cables I have tried are synergistic research SRX digital cables and Kubala sosna realization level for everything else. Most of my cables start at 6-10k. That is what works best in my system that has more resolution than yours.
Cardas Clear Cignus are dark cables that have nothing to do with price! Combine that with Passlabs and you have dark lord sith level sound reproduction of not good!!!
Most dealers that know what they were doing with system synergy can teach you about cables. I see just a hodgepodge of randoms you tried out yourself and it’s all over the place.
Call the cable company it is all they do is audio cables they can have a real conversation with you about your system and how to get more performance out of it.
Those cheap Chinese cables make low resolution systems sound nice but they will never get you to the level you want. I am suspecting just replacing ALL of them made a bigger difference because now you have the same brand all over! That’s where you want to start a journey but you have a long way to go.