??? What's the correlation?

It's a platform, meaning you cannot run your own servers (as compared to "servers").

It's also Deep Web, not Open Web.

Furthermore, it's US-based, with an unknown amount of Tencent backing, going back to before even its creation.

Because that's where people are. The choice is to run Discord or be ostracized.

No, you can (and should) instead ostracise people that use Discord. As publicly as possible. That's how you change things.

That's not how it works. People like us don't ostracize anyone. We are a minority. We have no leverage at all against massive communities with thousands of members.