About a year from the original post and the problem persists.
From a bit of digging, I believe that there are workshops that use bots to farm exp and free packs from level up. As long as they have a good number of bots roaming in the game, some of the accounts ought to be able to get rare items like heirlooms. The workshop would then sell the account+heirloom for a profit. Because getting a new account comes at no cost, they don't care if the bots are banned either, so the economy of these bots works out.
So, if your two teammates are bots, too bad. You are not gonna enjoy the game, and you will get penalty delays if you quit. Idk if respawn will do anything about them, cuz it's a fight you can't win.