You answered part of my question by pointing out the front was on an angle. That solved the fence on an angle perspective. The angle wasn't obvious.
You indicated you were not entirely satisfied. I quote : "I don't know why this picture was so difficult to edit, maybe it was because of the dreary looking day with the over cast sky," .
I took from this that maybe the reason you weren't satisfied is because there's something in the photo that just doesn't seem right to you, but you can't lay your finger on it yet.