I'm not a pro and I struggle with this kind of subject matter all the time!
You come across something that attracts you and you want to make an image but so often it is a scene like this with interesting elements but unless you can capture the objects in some kind of pleasing order or arrangement or you focus on a definite object of interest, you will not get a memorable image. I think great photos of this kind of scene require the photographer to make some kind of order out of the disparate elements in the scene. Adding a leaf just adds another item to the chaos you are trying to work with.
The leaf is particularly unwelcome, in my opinion, because it has introduced specular highlights which are distracting, especially as you managed the exposure of the running water to avoid those distractions.
One way to tame lots of objects is to include only a few in the frame, probably, easiest with one. Here, you have the flowing water in the background, the rock with attractive plants in the foreground, all the rocks and water in between and . . . your leaf. Most of the objects are scattered randomly in the frame and there is not much connection between them. Except there is a connection between the green plants and . . . your leaf—they are all in the same boulder!
So, I would go back and try to isolate one object or find an arrangement that brings some kind of order. Otherwise, you end up with a random image (irrespective of the time you spent focussing and checking the exposure) and random views seldom make for good viewing.
Roger
