The first three parts of this critique are written based purely on examination of your photo. "Final thoughts" is written after reviewing your score, photographer's comments, and voter comments.
TECHNIQUE This is a very unique image, one where the usual technical benchmarks are hard to judge. Color saturation is certainly rich. Focus on the mono background is adequate.
COMPOSITION Wow. What to say? It's a very interesting and different concept. I love the idea behind the image. I can see that the leaves behind the filter are green but the effect is very subtle. I believe the intent of the image is to show that this magical filter somehow imbues color to an otherwise drab BW image. If so, I'd have punched out the greens until they nearly popped out the top. But how to achieve this and preserve the colorful rainbow filter?? I imagine that this is what you struggled with in post processing as well. As shot, it takes some time to appreciate and I'm wondering how many DPC voters invested the time necessary to appreciate such an image.
EMOTIONAL IMPACT The more I think about it, I wonder if you would have better served this concept by muting the filter colors and jacking up the tree-green?? I can't decide. I think it would have had more initial impact if this had been the way. As presented, the filter captures the eye quickly and the background trees seem almost an afterthought. The conceptual foundation of the image is wonderful, but the execution probably lacks that 'pop' that DPC voters seem to expect and demand.
FINAL THOUGHTS Your commenters were mixed with most liking the concept and a few missing the point entirely. Given your final score of 4.9, I'm guessing most voters gave it a quick look, didn't see the point, voted low and moved on. Same sad story. This is a very strong concept and one that, shot a little differently, probably would have pushed six or higher.
Interesting idea. The door frame(?) at the left side is distracting, leave the composition looking unbalances.
Yeah, that's the streetlight pole the pinwheels are mounted on. The shot with the "best" blur(?) had that angle -- the ones which missed the pole were either too blurry, not blurry enough, or had some other problem ...