I would like to see more contrast and 'action' in this shot - so how about this? - I used a LocalContrast action
I'm happy with a sloping horizon as that is real life! - it is that little bit of white on the far wave that distracts for me, because I'm not sure what it is and composition wise it is in the wrong place!
You also have the lens hood clipping the top of the image.
But having said all that - I think the image is a good reminder of looking out at sea and I can see the potential in it
Well done