Sure, but
1) they're kids. Of course they're immature (and of course there will be kids. It's a community built around video games).
2) asking questions is just kind of how Discord works. Knowledge isn't stored and organized like on old-school forums or Reddit. Discord is a tool where people are expected to be available for almost real-time discussion. I personally struggle with that format, and tend to only use Discord as a messaging app for small groups of friends. I've tried joining Discord servers organized around a topic with larger groups of people, and it just doesn't seem to work for my brain, so I leave.