Really? Barely noticeable for most of us. And those we do notice, don’t really matter.
It’s not Lord of the Rings. It’s not supposed to be. It’s a set of stories written by others because the original was sold for cold hard sweaty cash. Whether it cleaves to a portion of Tolkien’s notes or not has no bearing on whether I enjoy the show or not.
It’s what we have. I’m glad they’re making a fantasy series with elves and such and it’s cool to imagine how Sauron might have made the rings. If you want to tell a different story then feel free. I see many folks very good at saying what they don’t like about the series but not very good at articulating an alternative.