Lack of clarity in constellation maps, messy lines, overly complex design, distracting background, unclear composition, unrealistic portrayal of constellations, inconsistent style, cluttered appearance, lack of balance, dull atmosphere, lack of depth, unclear purpose, lack of connection between constellations, awkward positioning of the maps, lack of symmetry, unnatural angles, lack of contrast, lack of attention to detail, disproportionate parts of the constellations, lack of educational value, lack of sophistication in the overall design.