Color Saturation and Hue: Colors are realistic, hues are normal, saturation is not overdone.
Brightness and contrast: Contrast is good, highlights could be a little brighter.
Focus and depth of field: Focus is nice and sharp. Depth of field feels a bit shallow. The spider goes soft on its back and on its legs in the foreground.
The spider's face is partially obscured by two of its legs. A different angle for the photo would have helped here. The biggest problem, outside of the gross out factor that got you a bushel of ones, in the voting, is that there is no defined point of interest in this image. The sharpest areas of focus are either beetle legs leading you away from the picture, or hairy spider abdomen, because the face is obscured by soft focus legs.
From this angle it about all has to be sharp, and even then there is the spider face problem. Seeing more of the face is probably the best quick improvement to the image.