Not sticking together is one of the main reasons you aren't winning. Not sticking together means your enemy who does stick together will just pick you off one by one. It's not that hard to understand.. You need to stay with your team to win. Although it doesn't guarantee you a 100% victory, it does however guarantee a higher possibility of winning the match..
Stop drifting away from your team. Stick together. Always.
I'm sick of people going off on their own ways and then they always wonder why they keep losing. Well, the answer is right there. You're drifting away from your teammates!
Stick together!! Stick and move!
Not always. I actually "drifted" off and the rest of my team and all the enemies were fighting each other while I was going around the map looting supply boxes and flanking after.
The best teams know to stay together, but ALSO know when to "drift away" into flanking positions, and how far they can afford to spread out without becoming isolated and open to divide-and-conquer attacks.