I don't think you over-sharpened it. The only thing not so nice is the sky. I'd try to get some blue in there. You can also play with levels to get the 'haze' out of your image.
Depends on what you mean by "saved." Unfortunately, I don't think it's that great to begin with. As for the sharpening, it's clearly very over-sharpened, as evidenced by the artifacts.