成事不足，败事有余
chéng​shì​bù​zú​bài​shì​yǒu​yú

unable to help but able to spoil

  1. 成事 chéng​shì
    to succeed
    To accomplish an objective; to successfully finish a task or get something done.
  2. 不足 bù​zú adjectivenoun
    insufficient
    insufficient; lacking; not enough; inadequate
  3. ， bài
    non-Chinese
  4. 败事 敗事 bài​shì
    to spoil a matter
    to spoil, bungle, or ruin a matter; to cause something to fail
  5. 有余 有餘 yǒu​yú adjective
    to have extra
    to have an abundance; to have enough and to spare