unproficient (?.)

• artless
• half-assed
• inadept
• inapt
• inattentive
• inefficient
• inept
• inexpert
• mediocre
• pedestrian
• poor
• skill-less
• thoughtless
• unapt
• undeft
• undexterous
• undextrous
• unfacile
• unhandy
• unintelligent
• unskillful