For long-distance co-op with friends on US servers, my console used to lag constantly, so I added a proxy server for USA
https://proxyline.net/en/proksi-dlja-ssha/ . Connection became rock-solid, and I can stay in matches without sudden drops. Voice chat works perfectly even during long sessions. I can switch between games mid-session without losing connection. Even region-locked bonuses and DLCs are now accessible. It made teamwork in online games a lot easier. Every gaming night feels smooth and connected now.