So many of these games require servers when it shouldn’t. Playing simple coop should not be dependent on the companies underwhelming server infrastructure.
Borderlands proved this with allowing people to host coop sessions without any need for servers.
Conversely, this game is P2P where it should have dedicated servers. This would also solve the issue of requiring such aggressive anticheat (nprotect gameguard, used mostly by cheap east asian mmorpgs) because they could use the dedicated servers to authenticate purchases as well as most cheats. Generally server authoritative games (as oppposed to most P2P games being client authoritative) are immune to most cheats such as damage/speed modification, teleports, noclip, etc. They will generally only have an anticheat to try to mitigate aimbots or xray/wall hacks.
The game has a global war that is going on. Every game adds or removes capture points from the world you fought on.
They could have let you play without that but everything is tied in including your player advancement.