You are not missing much..
When it does start- it goes something like this...
Wait 30 min for room to completely fill.... Play your first match... Win.. Go back to the team room.. Find that player 2 on the opposite team left (quit or got disconnected) that match is a draw, it repeats the process of trying to fill the room and start over.
If 1 person leaves for any reason during any portion of the game, it has to restart and refill....
Out of multiple tries at team battles, I only completed 1.
In theory- it is an excellent system. However with Internet rage, sketchy net-code, and apparently no backup system if one or more players should exit during the matches, it suffers and becomes a waste of time.
This is based off my experience and opinion... Hopefully others vary