Hi there @Xentime
Sorry to hear you've run into this issue. It's something we're aware of and actively investigating, as you can see on this thread: https://steamcommunity.com/app/581320/discussions/0/1742227264190750496/
If you could please submit your logs to firstname.lastname@example.org, that would be very helpful!
Are you currently unable to play 2v2 with a friend against AI? It should be possible. After you click Battle in the main menu, there will be a "invite a friend" button on the far right of the screen. 2 player co-op will be available at launch on January 24 (Thursday), but will be in an early access state until we feel it has reached the level of polish we want.