why are there no flat earth maps? surely after all these years someone would have mapped it.. unless it is unmappable because the earth isn't flat.
why are the globe earth maps accurate and flat earth maps don't exist?
Well all the maps you view are flat maps, other than your globe, which isn't accurate for flights.
Any map you use other than a globe, is a flat earth map.
You are asking for a large compiled flat earth map encompassing the entire earth, there are several, and they are more accurate than the globe when viewing long distance flights, but a "perfect" flat earth map without errors does not exist.
That's a massive undertaking to create something like this, we would need a large organization or a government to fund and create one, and with "satellite imagery" (Which are high altitude planes photographs or CGI) controlled by the government and military, there is no honest non-satanic entity out there to make one for us with these kind of resources.
The one's we have though are good enough for proving your globe wrong, for flights at least. With areas like Antarctica and the north pole off-limits there are giant blind spots in our known world so we are unable to map the perfect one you ask for.