Lord of the Rings vs. Ring of Darkness

Examples?

ANY book.

Multilayered and intricate plot where many questions remain unanswered until the very last pages of the Ordered Cycle? Merging several book series into one? Complex characters and the changing nature of many characters?

I laughed for a long time, thank you. You say complex characters, but ask any normal linguist or literary scholar to analyze Perumov's language and his characters. If you remove their lengthy complaints about it, you can hear a professional opinion that is very different from yours. His plot twists and endings are also very unexpected, especially in The Stations of the Magician. It's all (childish) unexpected.

In that case, "The Lord of the Rings" is a fanfic of the Ring of the Nibelungs, and Goethe's "Faust" is a fanfic of ancient Scandinavian sagas.

No offense, but you should at least clarify the meaning of the words you use. Fanfiction implies action in a specific world or the transfer of specific characters from another work. In Perumov and Nienna's works, everyone hangs out in Arda, while Tolkien has his own world, which is very different from the world in which the events of the Song of the Nibelungs take place (have you even read it?).

- you probably consider a gathering of orthodox and fanatical Tolkien fans to be a serious role-playing game, well, fanaticism usually doesn't lead to anything good, it's good that there are fewer of these "serious" role-playing games and more role-playing games with the participation of normal people with an open mind.

By a serious role-playing game, I mean a game with a large number of thoughtful and attentive people. Among Perumov's fans, I don't personally know any such people, although I know quite a few fans of this guy. And do you often attend role-playing games, that you noticed such "ambiguous" trends?

Perumov's work has proven its viability at least by the fact that it has been published for more than ten years, has gathered its group of fans,

You have original criteria for viability. Drugs also have their own group of fans, I would even say fanatics. They are also "published" for a very long time. If something is liked by someone, it does not necessarily mean that it is worth it.

and even on Litforum in a dispute between Tolkienists and Perumists, the Perumists won.

Thank you, I laughed again. There are no winners in a dispute, it is not a race or a problem that can be solved unambiguously. And who shouted louder is not an indicator.

Try writing a couple of pages of similar nonsense yourself.

Although I do not claim to have literary talent, I could probably write a couple of pages, but I would not sign my name to it, I would be ashamed to associate myself with such a thing.

I'm explaining that I'm not a fan of Nienna (I only liked the first part of the Black Book of Arda), and I'm not a fan of Perumov: I already said that he has some flaws, the narrative is sometimes drawn out, etc., but you can't criticize them for "daring to touch the sacred."

I'm not a Tolkienist either (rather, the first stage of Tolkienism: I read it - I liked it), and I'm not criticizing them for "daring to touch the sacred." If you have talent, write your own, if you want a sequel, make it high quality. If you can't do either, do something else.