Hello @keen yarrow ,
I'm sorry to hear you experienced problems with connecting to multiplayer sessions. Please note that all multiplayer instances of the game are peer-to-peer, meaning that connection issues are a result of problems or differences between players' network connections and configurations.
Please see this article for steps to improve your connectivity: https://support.thehunter.com/hc/en-us/articles/4417163840530-I-can-t-join-or-host-a-multiplayer-game-for-theHunter-Call-of-the-Wild