Edit: damn you PS4 players. Can't talk to you guys in-game.
I have one mate who is over eager and constantly knocks me off the ball trying to score. We communicate but everyone wants to be the hero, especially as we have a rule where you have to do 10 pressups if you fail to score 100 points.
Seems like you guys are going for the same ball too often, which to me says you're thinking
and responding to situations the exact same way. I think you guys need to stagger your positions more to avoid aiming for the same ball.
The general 'rule' I told myself to follow is that while we consider a person's blindspots with ball cam on, we should be constantly thinking in the back of our heads, if my teammate up ahead who is in possession or is contesting for possession of the ball, if he/she loses/misses the ball,
who is going to cover their back? In a 2v2 situation, the answer is obviously you, the one who isn't in possession of the ball. In 3v3s, that's a bit more complicated depending on how you guys like to structure your rotation methodology, but if it helps, you can deploy the same idea I mentioned before:
If you can see someone in front who's in possession of the ball, you let them do their thing, remember that they can't see you so they can't adjust their positioning in accordance to you, but stay far back enough so that you can cover the possibility of them losing possession of the ball as well.
If you can see both your teammates, you hold the biggest responsibility for making sure the ball doesn't go past you, since you have no one else to cover you if you screw up. So stay the furthest from the ball to cover all possible directions the ball can fly in (but don't be a dupe and sit in net when the ball's on the other half of the field).
If you moved up, and you know that you have teammates behind you, but you don't have a good chance of keeping, regaining or at least knocking the ball out of their possession, just rotate to the back of the line. If someone tries to get the ball up high and over you and you don't feel you can reach it without having to reverse a bit first, I'd just rotate back.
This is a very linear structure of rotating, and has its limitations at a higher level due to its inflexibility, I'd say it's a good place to start practicing this until you guys know how to work with each other in various situations where mixing up the rotation shows its benefits. Perhaps it's something you can try with your friends for a while.