mangelhaft

adjective
  1. Imperfect, defective, or substandard; describing something that fails to meet required standards or quality. adjective
    The report was found to be mangelhaft and required significant revisions.
    His performance was mangelhaft, showing a lack of preparation and skill.
  2. Poor or inadequate in quality, often implying deficiencies or shortcomings. adjective
    The workmanship was mangelhaft, with several visible flaws.
    The safety measures were mangelhaft, putting everyone at risk.