amateurish

1. (derogatory) Suggesting or reflecting the efforts of an amateur; not seeming professional or polished.Examples: "Some of the photographs are new and interesting, but many captions are amateurish, uninformative or simply careless."; "Behind her on the wall was an amateurish painting of an old day, set in an an ornate antique frame."; "Moreover, Trump’s use of obvious disinformation — the amateurish video he showed Ramaphosa, and his accompanying statements about the “over a thousand” killings of white farmers — to try and make his case has uprooted whatever U.S. credibility had survived over the last several months."derogatory