Where is this evidence that "Ships always disappear below the horizon, distant landmarks are always partially obscured. And here's the point, they always disappear bottom first."? I don't see that you have provided any evidence at all. These are just statements.
I mean, this is a well known phenomenon. You have whole a Wiki page which attempts to explain why it happens on a Flat Earth.
I've also made personal observations of things like wind farms out to sea. It's noticeable how the distant turbines are obscured more. I've posted videos like the Turning Torso one - multiple observations made from different distances which show the effect. And you can find many timelapse videos on YouTube showing ships going out to sea or coming in to harbour which clearly show the effect.
Do you have an example of a timelapse or other observation where it does not occur?
Also, the type of curve that this effect is making may not be compatible with creating noticeable obscuration of something near the surface at 23 miles. Most of the examples of variable light curvature of a closer distance. As I have stated, I could either see the other shore or I could not. If light is bending it would need to be bent in a special and precise way to half-obscure a distant 23 mile landmass.
As a wise man once said, Where is this evidence that "The entire beach is visible down to the water splashing upon the shore."? I don't see that you have provided any evidence at all. These are just statements.
And the point you are desperately trying to avoid is that you claim that "provided that there is no fog and the day is clear and calm, the same result comes up over and over throughout the year.". Again, no evidence provided, just your statements. And yet on the aforementioned Wiki page you claim the effect is inconsistent.