Looks good on my screen.
Seriously though, this is one of the dirty little secrets of photography on the web – a lot of image simply look like crap when they're reduced in size to 800 pixels, reduced in gamut to sRGB, and otherwise massaged for the web.
I used to not post images which were likely to be problematic for viewers. Now I figure that its the viewer's problem, not mine.
And, as for people that try and judge camera IQ based on small web images, well, the less said the better.
Michael