I cannot comprehend how a flat-earther can believe that there is some kind of conspiracy hiding the truth. There are literally millions of people that directly depend on a spherical earth in so many different ways. I can't fathom how so many people could keep such a secret for thousands of years.
My conclusion is its a giant game to them and they don't actually believe their own nonsense. There's no other rational explanation for it. I gave up taking OP seriously when he started selectively believing in laws of physics. Eg., Coulomb's Law is correct but the Law of Gravity is bullshit. Its a giant charade of choosing to believe only in what suits their weird troll agenda.