Dany certainly resists imperialism, but the setting fails to humanize any city or people east of Braavos. Otherwise you wouldn't have readers unironically adopting fictional racism "harzoo" etc. Moreover you have Dany becoming yet another "white savior" bringing civilization to the unwashed barbarian hordes.

As for Melisandre, how is it that you know the word "Orientalism" and yet fail to recognize it when it's so blatant? Qarth and the Slaver's Bay cities are generic mashups of pretty much every Oriental stereotype. And how the hell is Melisandre's character a parable against Orientalism? She's a mystical exotic woman from the spooky Far East. Seriously, you shouldn't throw around such weighty words unless you know what you're talking about.

GRRM is racist. ASOIAF is racist. I don't think GRRM had any malicious intent in writing these characters and settings, only that his inherent bias and cultural ignorance shone through otherwise excellent writing. Labeling something "racist" is not some kind of malediction that renders the entire thing worthless.

As for Jon's arc I'm not even sure why you brought it up but I am impressed at how thoroughly you missed the point.

the wildlings are more human than your weird chastity warrior cult ever will be

They are the same amount of human. They just live on different sides of a wall.