They have openly admitted to rejecting the established lore.
They're making Galadriel into a clear Rey/Captain Marvel type when she is supposed to be essentially a symbol of beauty and innocence. Her character in the books was by no means a warrior in her past leading armies into battle.
They've neutered Elrond to be a simple diplomat rather than let him be the warrior he actually was.
They apparently have decided to include sex scenes and make it GOT-like, which is clearly something a devout Christian like Tolkien would want for it, especially given he laced the books with Christian themes.
One character is legitimately a POC social justice activist. You can say "oh people are just mad about black characters" but it'd be like casting a bunch of white or Asian people as natural-born Wakandans in Black Panther. This is a mystical world based on northern European archetypes and mythos. The descriptions of these races was pretty clear.
The marketing has been heavily socially justice themed. They hired a bunch of Gen Zers to do a "hype analysis" after the first trailer and it was clear none of them were actual fans, despite the advertising being about how they gathered some of the biggest Tolkien fans in the world.
The CGI looks uninspired and horrendous. Mandalorian looks better yet this is the most expensive TV show ever made?
The trailers look soulless and generic, and the woke garbage I’ve heard some of the producers and cast say bodes very ill. I can’t say I’m optimistic.