To develop a good team relationship and improve my own and others skill.

I am a long term player of COD (UK based) but only really started to get serious when warzone was released. I only play warzone except for when I want to level up a loadout so I've managed to get a good feel for the game. I have a good amount of wins but more often than not I'm let down by a teammate giving away our location by testing a gun against a wall or driving a vehicle for no reason. Hence why i'm seeking a reliable team whos interested in helping eachother progress.