Lack of clarity, messy lines, lack of contrast, confusing shapes, unclear proportions, awkward angles, lack of definition, unfinished appearance, lack of detail, inconsistent linework, unrefined edges, lack of structure, uninteresting design, lack of dynamism, lack of depth, generic depiction, lack of character, lack of innovation, lack of personality, lack of charm, lack of creativity, lack of precision, uninspired execution, lack of definition.