For me, there are two problems with this picture.
The first is that there are many elements that compete -- perhaps too many. The wooden structures look quite interesting, but they are not prominent enough to be the main focus. Getting to a different vantage point with a longer lens might yield interesting results. The idea of a swamp gets lost a little bit, the shape of the framed portion of the water body is not very geometrically attractive, and I'm slightly irritated by the water 'flowing' out through the lower right corner. The distant tree line is attractive, but too far away or too cluttered by the foreground elements to become the main focus. There is a railway track on the right as well, whose importance is questionable. So my eye keeps jumping back and forth between the different elements. I think there can be successful pictures with that many elements, but you want to arrange them carefully within the frame. It is only possible to do this if you are inside the swamp where you can move about, using perspective to weigh the different elements within the frame.
The second problem is tonality and color palette. I think the light was unconducive to this scene to begin with, and you may want to return on a clear day when the light is low to get more contrast. I think the shadows are lifted too much, resulting in a washed-out appearance. As Bjørn remarked earlier, the sky seems to be blown out. If you can post a flat RAW conversion, it might be easier for us to tell whether the problems are due to processing, or whether the original capture already had those problems.
