Remember good leaders are not necessary good 1vs1 players but good team players that LOVE helping other players and will do ANYTHING for the community to thrive both ingame and outgame.
Well said. However, you do have to take into account that this game cares nothing for team games as it does nothing to scale them appropriately. They marketed this game on launch as a 1v1, 2v2, 3v3, AND 4v4 experience as if they were all equal, but I'm pretty sure we know they're not (I doubt anyone who's played vCoH or the beta expected it to be, but you can't say the same for newcomers).
Moreover, aside from 2v2, this game doesn't even promote teamwork in its team games (and in 2v2 you only see some forced teamwork because Soviets need to split tech/commanders and Germans need to split T3/T4). It's just Panther spam or Mark Target spam for the win (the latter being if the Soviets don't just utterly get crushed regardless).
The game itself doesn't promote any of the cooperation that you were referring to and you can't fault the playerbase for not forcing it themselves. You also can't fault 1v1 players for not giving the other player tips because let's face it, most people just aren't that nice. Just seeing a "gl hf" is already asking for a lot.