Please all, and you will please none.

Aesop (620?-560? BC) Legendary Greek storyteller

Fables [Aesopica], “The Man, the Boy, and the Donkey” (6th C BC) [tr. Jacobs (1894)]
    (Source)

Alternate translation: "By endeavoring to please everybody he had pleased nobody." [tr. James (1848), "The Miller, His Son, and Their Ass"]