I think his ex wife also said that it's just embellished stories if not completely made up. Let me see if i can find it
Edit:
https://www.nytimes.com/1974/02/06/archives/solzhenitsyns-exwife-says-gulag-is-folklore.html
She said its "folklore" and its significance "overstated"
It is baffling not gonna lie. Craziest example i can think of is the youtube channel "socialism4all" who makes audiobooks of socialist works and even adds very helpful comments here and there about context and clearing up terminology and even he denies china being socialist. Like, mf that is your entire damn job! How the fuck did you read through all of that, add comments, make a playlist for beginners out of it and then not realise that china is one of the most successful examples of what you read and recommend?!
And then, in his added notes, he goes on to make fun of anarchists, social democrats and, ironically enough, left coms.
Really sullied his great work with those takes imo