Your experience is very curious to me and completely different from my experiences with Aurender servers, I still own a N100 and a W20SE. They have completely out classed all PC based servers and other similar stand alone streamers. I would work with your dealer on this. This plain should not be true.
What is your incoming power like? USB cable. There is something very wrong. While I probably would have gone with an N10… yours should best a NUC without breaking a sweat. PCs are very noisy environments… regardless of what else is running. I recommend some real problem solving to find root cause… something is not right, although it does not stand out to me.