1. You miss your first shot on the opposing player, and you lose that battle. The way you can fix this is practice, practice, practice. Hey it may take forever, but it will be rewarding in the end. I recommend playing skirmish or elimination because they are 3v3s. 2. Your team mates have bad team communication. Wether it's getting revives or making call outs where enemies are, if your team doesn't listen to each other and act on what they say, you will lose. 3. You are being outgunned by something with a quick time to kill, (Wormwood) because they are hitting all their headshots. To solve this, I hate to say it, but buy the (Wormwood) quick time to kill weapon so you have a chance at beating them when your in battle. 4. You don't know what the enemy team is using, (Weapons,Exotic Armor,Subclasses) and therefore you can't counter them. Be sure to go to the roster before starting the game and let your team know what they are using. 5. You chase an enemy who is by himself. If you do this, you most likely will end up either dying to them, because you lose the gunfight, or you get team shot to death. To fix this, have another teammate closing them off so they can't run anywhere else, or have them team shot with you to kill them before they can run any further.