I discovered Tolkien long before Middle Earth was put into pictures by Peter Jackson.
So I created my own image of this story before the movies that are canon today existed.
The first thing I would say is that the Jackson movies also have big differences from the books.
Quoting from memory "The Fellowship of the Ring" is massacred, especially on the journey from the Shire to Rivendell.
Tom Bombadill and the Old Forest, the Barrow-down, etc. disappear.
In "The Two Towers" they put elves in the battle of Helm's Deep, which is impossible since the last alliance between men and elves occurred 3000 years before.
In "The Return of the King" the Battle of the Shire disappears.
The Hobbit trilogy was directly pulled out of Peter Jackson's balls, pardon the expression.
So it's nothing new.
My opinion?
I like the series, the photography, the staging and the cinematography seem excellent to me.
That Galadriel doesn't seem so smart?
Well she is 3000 years younger than in the LOTR events. In addition, the idea of the perfect, intelligent and fair Elves is from Jackson's movies, the elves do stupid things, commit cruelties and murders in The Silmarilion. The Slaughter of Alqualondë for example.
That they put a black elf in the series?
There are no nogre elves, but if there are black men in LOTR, in fact the army of Mordor has entire battalions of blacks from the South.
But in a fantasy world, if someone is upset about putting a black man in a role, the problem is whoever is upset.
The problem with the series is including men in general.
To include the human race they are compressing the story too much, because otherwise it is impossible to have human characters with whom the public identifies and the story should be only elvish.
since in a history of thousands of years the human characters in particular only appear in fleeting brushstrokes.
Honestly, I like it and it's enjoyable.