Not to add fuel to the fire and run away, but the LOTR trilogy ain’t 100% Tolkien faithful either. Faramir’s character was completely changed, entire chunks of the book were removed, and rolls were completely swapped out.
I wouldn’t be surprised that if those movies came out today the outcry would be massive. I can almost see the YouTube thumbnails photoshopping Greta Thunberg’s face over Arwen and Eowyen.
Conversely, if this show came out in 2008, I challenge the notion that the backlash would be the same.
The cry for Tolkien purism may be true to some, the PJ movies had that cry (although so quiet in the discourse) but it just seems like a shield to criticize diverse casting and female main characters.
If your claim is that it’s “not Tolkien’s story,” then you probably shouldn’t be watching any LOTR adaptation.