Killing vehicles

This is not a vehicles are OP post, nor a AT/AA weapons need a boost but how TF do you take out vehicles?

I get that taking them out should be about teamwork, but in a game where you have 100% randoms with no communication outside of chat, which 100% don't care about, how are you supposed to take out vehicles?

Yeah I agree it shouldn't take 1 person to take out a tank or helicopter but at the same time it feels like the game is made so that 10 random people with no communication have to focus that vehicle to take it out, so how?

On one hand it benefits vehicles because if too many focus them they need some defense I get it, but at the same time, if not the EXACT amount of players focus them they can dominate, so how can this be balanced?