I noticed most if not all in-game chat is done in relation to tanks. "Wow thanks guy you let me carry the team to victory by afking on my ass for 30 mins" or "we're losing cause no one is doing the same to our tanks". You need like 3 people actively emptying their RPGs on a tank to kill it. Likewise every 3-4th person is a medic so reviving isn't really seen as an honorable duty.
There's just no class or element to the game that is enticing to pursue. It's all kills kills kills. Jerk off in a tank, jerk off behind a tank, jerk off in a plane, snipe from a corner. There's nothing to do but kill which sounds idiotic but it's how it feels. I've played exclusively non-CoD modes and while sometimes it feels good, rarely does even my 6-7 killstreaks feel rewarding. "Oh I guess I met some enemies who aren't gonna shoot me before turning around".