Messy lines, unclear outlines, lack of detail, chaotic, uninspired, lack of variety in flowers, monotonous, generic, flat, lifeless, overly simple, lack of artistic expression, repetitive, inconsistent style, poor use of linear art, unattractive, lack of depth, lack of clarity, unimpressive, awkward composition, amateurish execution, lack of intricacy, rough edges, disjointed, lack of balance, lack of harmony, lack of visual interest, poorly defined flowers, lack of cohesion, dull composition, lack of refinement, clumsy execution.