Why can't you play in Call of Duty: Modern Warfare in pairs?

So me and my carer want to play against other two teams, instead it is only him with 3 players in a team or 4 …

Sometimes I play with my relatives for two, but then our opponents are three… I would like to do that there can only be 2 people together Is there a setting for that?

We play on the xbox one.

This is not yet available but should come as many would like to have this Dou mode.

At the moment you can only do it alone, a team of three or a team of four. If necessary, you could play two games, but the other teams are three.

It is feasible for two against three teams, that even I can manage and I don't play much EgoShooter.