Ah, I see. However, I understood OP's primary reason for preferring Sci-Hub to be the one that he iterated in their first paragraph: "Nevertheless, I prefer this platform because I disagree with the publishing model of most publishers...."

That seemed to agree with the bulk of the article, even if they also liked the UX better. The article doesn't say it isn't better, it just says that the UX isn't the primary reason most researchers are using it. That seems to jive with OP.