I feel like you’re making a lot of assumptions here, possibly based on your personal experience, possibly you’re just doom’n.
I have been having a blast in Classic and TBCC with countless people who just have fun playing the game. Sure, losing isn’t fun, usually, so we try to win and if we can’t we can’t and that’s okay. I play on Whitemane US, i’m not sure if that makes a difference.
And WoW is still a big cheese, actually the biggest next to New World, it’s just not so new anymore so there isn’t a big need to advertise, more of a need to provide some good content and word of mouth will do the rest.
Also MMOs are like this because they have such a big age difference with the players I think. I haven’t seen so many different ages of people play any game like I have with WoW, not any multiplayer game at least. Kids and Adults working together to accomplish a task, well yea you can be sure how that’s going to turn out.