Not skillful.

The state or quality of being unskillful, of lacking skill

Of a person or workforce: not having a skill or technical training. / Of a job: not requiring skill or training. / Of a made object: inexpertly made or showing a lack of skill.

(Britain) Alternative spelling of unskillful

Lack of skill.

Foolish conduct; wrongdoing. / Lack of skill; skilllessness.

In an unskilled manner.