Amateurish, unprofessional, unpolished, juvenile.
Of inferior quality.
A professional sports association at the lower levels of minor league organization.
A low-ranking or inferior level among groups, professions, organizations, etc.
Incapable of, or indisposed to, effective action; habitually slack or unproductive; effecting little or nothing
Not efficient; not producing the effect intended or desired; inefficacious
A person who cannot or does not work efficiently.