Why are maps less accurate at showing earths surface than globe

Because there 2d instead of 3d

The maps are the 2 dimensional representation of the earth's surface. This maps are often used to show the earth's surface. But in order to do so, there occurs distortion while projecting on a map. Some of the properties of the map that gets distorted are as follows-

(1) Distance

(2) Direction

(3) Shape

(4) Area

These distortion occurs because earth is spherical in shape. So, while projecting it gets distorted in the polar and the equatorial region mostly, as the pole appears to be larger in size and shape. The direction is also affected.

Due to this reasons, the maps are not so accurate in showing the earths surface, in comparison to a globe.