You don’t explain conjunction in such details as as well and it is not universally present feature in all the languages though.

Writing about learning languages is tricky because you cannot write for a universal audience, you have to write for speakers of a particular language (I suppose English in this case, since the article is in English), you’re also lucky if you know whether they have ever learned any other foreign language, and what particular education system they’re coming from (some education systems teach basics of linguistics and its terminology, some don’t — a language teacher might find themselves having a class full of people who have never learned what a clause, subject, object, or conjunction are, who don’t have the mental model to operate with these categories).

I don’t speak any Japanese and your explanation was understandable to me (even if there were some redundancies) but I think the negative reaction in the comments is just because of mismatch of your mental model of a language and people’s mental models.

I understand you were writing about your own process of filling the gaps (btw, I also find it easier, or at least more fun, to understand the basics of grammar before memorizing all the specific forms), but I think it’s not very clear from the article as some in the comments seemed to expect to learn from it, rather than learn about how you solved a particular obstacle in your learning.

I hope I am not coming off as bashing you or your writing. I now regret writing my original comment now that I read all the other replies — it looks like I am your work calling the article redundant, I am sorry for that. I hope you continue writing about your learning path — language learning is fascinating, and the more information we share about how we learn, the easier it is for everyone. And Japanese is a very beautiful language! Kudos to you for tackling it.