Lack of detail, flat colors, lack of contrast, unclear elements, awkward perspective, stiff compositions, disconnected design, uninspiring background, lack of depth, muddy tones, lack of energy, unbalanced lighting, lack of emotion, generic depiction, lack of personality, messy execution, lack of character, uninteresting design, lack of innovation, weak color choices, lack of excitement, lack of realism, unrealistic machinery, lack of dynamism, poor rendering.