I like how each step of the Iron Banner quest says “as a team” yet you gain practically zero progress from your teammates’ actions. If the quest says “as at team” you should be gaining progress as your teammates do the required actions, otherwise remove that line of text because it does not belong then.
It for sure does count as a team. I was afk most of one match because I forgot to back out while I walked away and my progress was going up. Stop it.