There’s propaganda on both sides. You’re quite right about Galadriel in the earlier ages, but those complaining about her being a Mary Sue in the show are also missing the mark. She fought, she had ambition. Tolkien Elves are generally ridiculously OP compared to humans.

If you didn’t like the films, you won’t like the show. I’m ok with it so far, it’s exceeded my initially very low expectations, and as fantasy fan fic it’s fine IMHO.