A harridan is a "strict, bossy, or belligerent old woman", according to the dictionary. This Galadriel is all of those. She needs taking down a peg or twelve. Perhaps when she creates her mirror, she'll discover that Finrod is alive in Valinor and that she could have been reunited with him, her parents Finarfin and Eärwen, and Finrod's betroathed Amarië if she hadn't jumped overboard hundreds of years earlier. Her real reason for jumping ship should be that she wanted to have her own realm in Middle-earth but this series gives her different motivations from the Galadriel in the book and that Galadriel never took that voyage anyway. Becoming a powerful sorceress isn't indicated at all yet. I expect she has yet to meet the people who will form that ambition within her.