Do y"all not use the magic adapters that you plug in by your router, then by your PC to make a lan cable out of the electric wiring? That improved my cable management so much
Power over Ethernet adapters have some serious limitations. MoCa adaptors which use existing coaxial connections, even if you have cable internet, can provide greater speed and better latency than Poe. To be honest though, copper ethernet or fiber ethernet or generally the best way to go.
Drill through the walls or be lazy and run a cable over the roof
It's all about compromises. Aside from a massive solar flare ravaging the earth or a small rabbit nibbling on the wires, there's not much that will disturb the signal using an ethernet cable. Wifi is sensitive to other wifi and various home appliances, PLC can easily pick noises from a faulty device anywhere in your house (or your neighbor's…) and have to reduce speed to maintain an acceptable signal/noise ratio, etc.