Slide conversions leave much to be desired, in my experience. I would desat that blueness in the rock to achieve a grey that would make the red guy more apparently prominent and would desat the box as well. The stress of his action and the curve of the rod and net are the defining elements, so whatever you can do to emphasize this is gold. The tree seems perfect. Maybe mor detail/structure in the rock.I would play around with the color/density of the water as well and maybe up the sat on the yellow stuff to see how it all works together. Your job is to illustrate the power and harmony in the image through choices you make. But if sharpness isn't there, it's simply a worthwhile exercise.