Lacking the required professional skill
Lacking concealing elements.
The definition of incompetent is someone or something not qualified, inadequate or insufficient for a given purpose.
Pertaining to or like a dilettante.
Made up of amateurs:
A jackleg person or thing
Find another word for amateurish. In this page you can discover 30 synonyms, antonyms, idiomatic expressions, and related words for amateurish, like: ability, crude, unskilled, unprofessional, incompetent, dilettante, dilettantish, nonprofessional, unskillful, amateur and inexpert.