Lack of resemblance to chosen artist's style, inconsistent execution, unclear expression in the cat, generic composition, overuse of charcoal leading to a messy appearance, lack of attention to detail, lack of depth, uninspired pose, unrealistic anatomy, flat shading, lack of emotion, uninteresting fur texture, lack of harmony, poorly defined features, disproportionate body parts, lack of energy, lack of character in the cat, lack of connection to the chosen artist's techniques, lack of artistic flair, generic wall art quality.