pixelated, low resolution, watermarked, unblended strokes, mismatched palettes, excessive noise, jagged lines, overexposed, rough edges, flat lighting, unnatural shadows, limited depth, stretched textures, repetitive patterns, unbalanced composition, clashing colors, out-of-place elements, jarring contrasts, misaligned layers, inconsistent styles, chaotic brushwork, abrupt transitions, lack of focal point, over-saturation, disproportionate elements, too busy, overly simplistic, rough sketches, undetailed