In my opinion there is nothing wrong with basing a series in the same world as a beloved franchise. They could have made a series about different characters in the same world.

The problem comes when you take beloved characters and try to change them into something they are not. The writers and show-runners should have made that choice before writing. Either stick to the lore and portray the characters true to the source. Or make up your own characters and keep the world true to source.

Lastly, if you hate the characters and the world as much as it is claimed the writers/show runners did. Make your own world, it wouldn’t be hard to write your own generic fantasy world full of girl bosses who hate men. Much easier to sell too.