ok — all right; proceeding normally; satisfactory or under control: Things are OK at the moment.
conventional — Someone who is conventional has behaviour or opinions that are ordinary and normal.
general — of or relating to all persons or things belonging to a group or category: a general meeting of the employees.
inferior — lower in station, rank, degree, or grade (often followed by to): a rank inferior to colonel.
mediocre — of only ordinary or moderate quality; neither good nor bad; barely adequate: The car gets only mediocre mileage, but it's fun to drive. Synonyms: undistinguished, commonplace, pedestrian, everyday; run-of-the-mill. Antonyms: extraordinary, superior, uncommon, incomparable.
unnoteworthy — worthy of notice or attention; notable; remarkable: a noteworthy addition to our collection of rare books.
prodigious — extraordinary in size, amount, extent, degree, force, etc.: a prodigious research grant.
bad — If you say that it is bad that something happens, you mean it is unacceptable, unfortunate, or wrong.