Flat-Earthers seem to have a very low standard of evidence for what they want to believe but an impossibly high standard of evidence for what they don’t want to believe
One manifestation of the Earth being spherical is that low-pressure weather systems rotate anti-clockwise in the northern hemisphere due to the Coriolis effect.
The notion of a flat Earth initially resurfaced in the 1800s as a backlash to scientific progress, especially among those who wished to return to biblical literalism.