HN is still too mainstream, but it's going in the right directory with early 00s-looking UI and lack of JS bloat. Imagine something that can only be accessed with a text-mode browser using a protocol completely separate from, and unlike, HTTP, with no official Windows, Android or Mac/iOS build.
The community has to be small enough that it's irrelevant both politically and as an advertising platform.
I'm sure there are weirdos in the web3 spaces, but I feel like they're very outnumbered. Projects like ENS or IPFS are probably much more interesting to weirdos than most "crypto stuff". I2P too, though I don't think this twenty-year-old project should be lumped in with "web3".
I think the Fediverse is a better place to go. Lots of little communities, almost all of run by regular nerds, each one with their own quirks and petty personal drama and constant UI tweaking? It's like forums all over again, except it's now safe to use one password for everything.
Fixed that for you.
If you want the old internet vibe the dark Web is the place to be. Tor, freenet, i2p.
I'm quite partial to freenet because it's completely segregated from the regular internet and refreshes as the speed of dial up. No interactive web2.0 here.