The Battleground team matching system doesn't appropriately fill teams with even or fair numbers. I've seen 4 v 3 v 1s, 4 v 4 v 2s, 4 v 3 v 2s etc etc. In short, the system fills teams in completely the wrong order and doesn't divide the number of players properly.
The system needs to be reworked to fill for 2 v 2 v 2, then 3 v 3 v 3 and finally 4 v 4 v 4. NOT attempt to fill out teams of 4 FIRST leaving teams with only 1 or 2 players against 3s and 4s who they stand absolutely no chance against, especially in Domination or Crazy King where number of players matters as much as (or often more than) gear and skill.
The system also needs to be reworked to allow players who do get stuck in these situations to leave the battleground without penalty, as it is completely unfair and entirely unreasonable to force players to play a totally lopsided match due to circumstances out of their control.