I completed it now. You literally just have to keep playing until you win as defender and attacker on each space map, even though the quests can bug and complete early, you won't get the full finished product until you've done exactly 5 wins on EACH MAP.
It's kind of a nightmare because winning on attack is almost impossible when people ignore objective, so I found that I had to play roughly 100-150 games just to win 5 on attack which is seriously depressing. To make matters worse with it being bugged and also not indicating which maps you need to win on, you need to make a mental note of the maps you need, or just keep playing until it eventually unlocks.
Not 5 wins on each map, I mean 1 win on each map.
