mediocre

moderate to inferior in quality; "they improved the quality from mediocre to above average"

lacking exceptional quality or ability; "a novel of average merit"; "only a fair performance of the sonata"; "in fair health"; "the caliber of the students has gone from mediocre to above average"; "the performance was middling at best"

poor to middling in quality; "there have been good and mediocre and bad artists"