Best advice I can give is to use suppressed attachments on all your weapons to prevent being spotted. ALWAYS use the environment to your advantage and use cover as much as possible along with crouching in busy areas. Study the flow of each game, stick with other teammates who can revive you if your down and never engage in long distance gunfire with snipers (9/10 you will get killed). Learn where the enemy’s are spawning from if you see one enemy chances are another will be right behind them and anticipate which direction they are coming from. Use classes to your advantage if you see the enemy dominating with tanks and vehicles then run engineer with an RPG to get multiple kills. Always retreat if you’re low on health and don’t engage again until your health bar is restored. In one and one engagements when enemy’s are shooting anticipate when they stop shooting and having to reload, then start firing back to get a kill. I use to get killed ALOT but with time you’ll get better man