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!
**bleep** this **bleep**! I'll play how I want to play, no matter what.
TLoU multi is all about positioning and situational awareness. Move as a team, but always use different entry points and work to gain superior sight-lines on the enemy. Don't let them concentrate their fire. Force them to engage in separate directions, and always hold your line. Catch the enemy in a crossfire, and it's over. Mobility is the lynchpin of modern warfare.
Just saying, there's a reason you can see your teammates through walls.