I've come to refer to instances that federate with Hexbear and Lemmygrad as "East Lemmy" and other instances as "West Lemmy", and I do have an account I use to lurk "West Lemmy". There's a handful of good communities on .world: I mainly look at communities for things like anime fanart, but sometimes there's other things there that are worthwhile, too, like news or discussions about topics I care about. It is an unfortunate fact that most people on the English-speaking Internet are not communists, and so a lot of people will end up on instances that don't federate with Hexbear basically because they just don't know any better. And even if those people will oftentimes post a whole lotta cringe, and the administrators of these websites especially tend to be complete jackasses — there's also going to be things that people will post on defederated instances which you'd otherwise miss out on.
So as a whole I'd say that the administration of other instances should be changed, and people who use Lemmy expecting it to just be a new Reddit should either change their expectations or leave, but I accept that as long as these things just aren't going to happen, that it's worthwhile to have accounts on "both sides of the curtain".