Nah, you should read up about The Conqueror. Not just the fact that they filmed it near a nuclear test site and half the crew got cancer, but about Wayne insisting on doing what he saw as a Chinese Western regardless of the director trying to talk him out of it.
Have you seen any of it? It's not just modern sensibilities or identity politics. Even allowing that it was filmed at a time when interracial marriage was illegal in a lot of US states, people still found the combination of Wayne's characteristic cowboy drawl with the addition of a fu-manchu mustache pretty godawful. Absolutely panned. Can't find a detailed attribution, but Wayne himself is widely reported as having said the moral of the film was, "Not to make an ass of yourself trying to play parts you're not suited for."
