Bots are in on the Orbital arena. They're not good yet, but they will be soon. Important part is that bots are working!
Also don't forget party join also works, so you can be in a party with a friend and search for a match.
Don't forget to check the server browser and see if any games are already in progress, a lot of pick up games are happening at random times.
Lastly... please JOIN THE DISCORD! discord.gg/protoball