Mid Fi streaming question.

Hi all , I’m currently at the Mid Fi level and in the process of improving my system. My current streaming setup is an Innuos Pulse Mini with an aftermarket LPS feeding an original Schiit Yiggy with an updated Gen 5 USB. I’m running a Wireworld Starlight Platinum USB to the Yiggy and Morrow level 5 IC’s to my pre. I’m currently running single ended and will be going to a higher quality balanced rig. I believe that my streaming rig is already the weak link in my system even before I go to the new setup. But I have an issue even it this point. The music sounds acceptable under the circumstances about 2/3 of the time. The rest of the time it has a more hollow sound and a bit more glare. My exact question is , I am hardwired but have a real hodgepodge of a connection due to structural limits. I have ATT in via coax to a modem/ router. I have a cat 5 out to the other end of the house but dead end before I reach my destination. From there I have a TP-Link outlet adapter that the Cat cable plugs into. Then in my living room the other wall outlet adapter with a cat cable to the Innuos. I know it’s a real mess  and need a solution to the 6 items linked together that use my house circuit to carry the signal. However until I can get someone to run a dedicated line that will be 150 feet long and have to use an outside wall , any suggestions? My initial thoughts are to use some kind of Ethernet isolation filter. I see cheap ones on Amazon and some nicer ones that run about $300-400. My goal is to clean this up as I expect an improvement will definitely be had and eventually I’ll upgrade my steamer. Thanks in advance for not burning me at the stake. Respectfully, Mike B.