WordNet sense 1 (not carefully or expertly made):

rough

WordNet sense 2 (showing lack of skill or aptitude):

bungling, clumsy, incompetent, fumbling

WordNet sense 3 (lacking professional skill or expertise):

amateur, amateurish, inexpert

WordNet sense 4 (not characteristic of or befitting a profession or one engaged in a profession):

unprofessional

WordNet sense 5 (having undesirable or negative qualities):

bad