If you guys really want to rank up fast get a friend to look through your replays. Your higher ranked friends will be able to point out what mistakes your making. They also have a different perspective on the game. There playstyle could be better too so be open to different views. You will progress faster than the average person if you do this. Everyone else is loading ranked and putting their brains on autopilot mode and continuing to make the same mistakes. They are the same people who rage and say that their teammates are bad.