Come on, our explanations for those things are easily found in the literature and Wiki.
- During lunar eclipses (which occur2-5 times a year visible from all over the hemisphere) the Earth shadow cast on Moon is round. What shape casts round shadow in all angles? Right - a sphere
This is an ancient greek proof which assumes that the sphere is the earth rather than any other celestial body which orbits the sun.
- Sinking beyond horizon ship. Don't tell me your perspective bullshit. Even no a single vide on YT proving this nonsens, but tens videos prove the opposite.
Look at this photo: and follow the line of the turbines on left. No bending light, no nothing. Just the curvature makes the farthest "touch" water
Look up the chapter "Perspective at Sea" in Earth Not a Globe by Samuel Birley Rowbotham.
- Seismic waves create P-wave shadow zones during earthquakes which are symmetric and perfectly fits spherical earth, but not any other shape
http://www.cyberphysics.co.uk/graphics/diagrams/Earth/pand%20s%20shadow.png
As we see in your diagram, under the Round Earth model the seismic waves need to mysteriously curve as they travel through the earth to make any sense. The assumption that they are making straight line reflections in a plane is a more plausible explanation.
- Stars moving. How could you explain different directions of stars spinning in northern and southern hemispheres?
There are two magnetic and celestial poles in the most modern Flat Earth model. See The Sea Earth Globe and its Monstrous Hypothetical Motions in our literature repository.
- Moon in southern hemisphere is upside-down. How can it be on a flat earth?
This is explained in the Wiki. In FET this is explained by the different observers standing on either side of the moon. On one side it is right-side up, and on the other side it is upside down.
Imagine a green arrow suspended horizontally above your head pointing to the North. Standing 50 feet to the South of the arrow it is pointing "downwards" towards the Northern horizon. Standing 50 feet to the North of the arrow, looking back at it, it points "upwards" above your head to the North. The arrow flip-flops, pointing down or away from the horizon depending on which side you stand.
All planets are spherical and somehow Earth is magically flat? WTF?
The earth is not a planet. The earth is a plane which bisects the universe and, therefore, fundamentally different.