Rejected Pictures

There's not much going on.  No boat, no island, no fish.  In short, there's no visual interest for the eye to grab onto.  I guess you had to have been there.

Use Adobe Lightroom to correct the adjustments.

Here is a quick example:

Take a closer look at the water - see all those orange splotches? This is an "artifact". Also zoom into those rocks; they have a strange blotchy, orange cast which is not at all normal. You have applied some overly aggressive processing here to apparently make a dull scene photographed on a dull gray day look more interesting. Maybe your next trip to the beach will provide a more interesting sky and better light so that you can work on your composition skills...

The quality of your posted picture is too bad for a correct assessment, but even so, I can see an awful lot of colour noise. In addition, the framing is bad, too much water, too less beach. You should have gone for 2/3-1/3.