Quality issue for this picture question

The post-processing needs work, and I guess this is 'straight out of the camera'. And I guess it is from a drone.

Think about the composition, which can be corrected to a point in post-processing.

Read the following links to get a better idea of what to do.

User guide:
https://helpx.adobe.com/stock/contributor/user-guide.html
Exposure:
https://www.adobe.com/creativecloud/photography/discover/exposure-in-photography.html
Composition:
https://www.adobe.com/creativecloud/photography/discover/photo-composition.html
Learn and support:
https://helpx.adobe.com/support/stock-contributor.html

I see digital noise, particularly in the sky.

You need indeed to straighten the image and to add contrast. The picture is missing blacks. But the small sensor and post-processing did also eliminate detail in the asset so that it has washed out colours and no fine detail.

The size of an image is not a quality attribute.

The water line needs to be straightened. The horizon should be on a Rule of Thirds line. The lighting needs to be adjusted. The image needs sharpening. The foreground river adds nothing to the photo and should be removed.