XDefiant Launch Struggles

If you're having trouble joining games in just launched first-person shooter XDefiant, it's not just you. This post from earlier acknowledges a problem: "We're aware that some players are unable to join a game- please bear with us while we look into servers and matchmaking!" A more recent update says the situation appears to be improving:
Update: We are seeing progress on the matchmaking servers. We will continue to monitor the situation and keep you updated.