... I couldn't get any further back...
Actually, you only need one step to the right, not necessarily back. That way, the tidal pond with start from the left corner diagonally leading the eye to the rock formation in the middle. That step would also separate better the rock from the distant mountain. Turning the camera into a landscape orientation would also take care of too much foreground and would capture more of the cloud. Lowering the camera viewpoint might have been beneficial as well.
Post factum analysis, I know. But it is a skill that can be developed. Shoot, analyze, shoot, analyze, and at some point, all that analysis might pay the next time you shoot.
Buridan's ass comes to mind. Faced with an overwhelming choice, interesting foreground, interesting middle ground, interesting background, clouds, reflections, etc. we end up trying to encompass it all in one shot. Rarely works, as it leaves the decision to the viewer, and viewers hate that. If you can't make up your mind what you want to show me, why should I (the viewer) bother? So, make up your mind and select.