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.
Unhelpful, not useful; pointless (of an action).
Unable to do well at a particular task or thing. Useless is mildly insulting.
Without use or possibility to be used.
Good-for-nothing; not dependable.