The problem with Lemmy is that subreddits ("communities") are tied to a specific instance. So basically every instance has its own separate c/linux, c/funny, c/technology, c/anime, etc. This makes it really hard to use.
This is absolutely not true. As long as your instance is federating properly, you can follow communities regardless of where they are rooted.
If your problem is in discovering the "canonical" community in case there are duplicates, then I'd invite you to take a look at https://fediverser.network
Being able to "follow communities regardless of where they are rooted" just means that I can follow each one of the dozens of c/linux, c/opensource, c/funny. Each with their separate comment threads on similar submissions. Why would I want to do that?
Sure, you can pick a random one like fediverser.network apparently does. Looking at one line from the list, I see that r/manga points to ani.social/c/manga which has 561 subscribers, when lemmy.ml/c/manga has 3,480. What?
Differences in policy. There are wildly different ideas about what is and isn't acceptable.
> Sure, you can pick a random one like fediverser.network apparently does. Looking at one line from the list, I see that r/manga points to ani.social/c/manga which has 561 subscribers, when lemmy.ml/c/manga has 3,480. What?
That's not random. There was drama. The lemmy.ml admins are hostile to a lot of anime-related content and drove off most of the community that was accumulating there last year. ani.social is where the active, non-tankie communities are now. It's run with what seem like fairly reasonable policies and actually welcomes the subject matter. If you were relatively happy with the handling of anime-related content on reddit a few years ago then the communities on ani.social are probably what you're looking for; it's a good recommendation.
Your parent is exaggerating. The admins from .ml are not persecuting anyone, not exposing anyone and not even kicking out the existing subscribers that are ok with following the rules of the instance. The "drama" is just that they were clear they are not interested in hosting NSFW content and are not interested in providing a space for the hentai/loli/furry crowd. They defederated from ani.social because ani.social communities were posting loli, and that was it.
Because number of subscribers does not mean activity momentum, and recommendations for communities on topic-specific instances are preferred over communities on the "larger" instances.
Lemmy.ml was the first instance, so naturally many people created communities there before. This does not mean that it's still where the anime fans want to congregate. The admins of lemmy.ml also said that they want to promote decentralization so they want as few communities there as possible.
If your problem is in discovering the "canonical" community in case there are duplicates, then I'd invite you to take a look at https://fediverser.network