I have a double nat issue as I am running a secondary private network off of a main router.
This is because we live in a flat that doesn't have its on internet connection so we have no choice but to share our landlords.

For privacy, I cant have the router in wireless AP mode as this links all my devices to my landlords. TVs, PCs, printers etc.

What I want to know though. Is why can I play multiplayer games with no issue on my PC which is connected to the same private network, But the xbox cant? the xbox cant even find games yet I play daily on my PC without issue. why is the pc able to auto figure this stuff out but the xbox isn't even capable of doing it manually.

net map:
internet->ISP->Landlordsrouter->myrouter->xbox/pc/tv