Those of us who are engineers have pointed to real experts on how Ethernet works. We are fully open to new information that can be explained in this universe. Those who believe in only their ears have offered no argument than to attack others. "Your system is not resolving enough" is nothing but an assumption smokescreen for someone with no argument. I suggest looking up the topic of argument fallacies.
That leaves placebo effect or an extraordinary claim. Many of us understand the placebo effect and that you "hear" what your mind wants you to hear. If you hear it better, good for you. Be happy. To go the step further and claim because you hear it it must be real is where your argument breaks down. Extraordinary claims, that "other things carried along" need some evidence.
Just because someone in an engineer does not mean they do not want to achieve better sound. Instead of making extradentary claims that are outside known physics, maybe it would be more beneficial to understand more on how we hear so you can go down a path that improves the actual sound reproduction.
Ethernet moves bits from one location in memory to another location in memory on a different device where it can be accessed by the client's application. That is all it does. It can't reach past that location in memory because someone wishes it to be so.
Lists of boutique hardware do not change physics. Missing is your test method and description of the resolution of the tests. At what point in client memory are you comparing the data to what point in the host?