Positives:
This is a nice image. It has an unusual and refreshing placement within the frame for the main sharp icicle. The soft focused icicles in the BG add interst to the composition. Choice of blue tones always work well for ice images.
Technicals:
It has above average technicals and tones. Sharpness is good but it can handle a lot more sharpening and would look even better. It is hard to describe but the other BG icicles almost look as though they have unrealistic haloing around them. It does not affect the rest of the image. That is probably due to your post processing.
Viewers may get distracted wondering what the elongated out-of-focus objects on the right side of the frame are and that draws attention away from the main icicle.
The challenge:
Meets the challenge well and is a classic icicle view. I suspect an overabundance of icicle images cause this one to be overlooked for a hihgher score.