sterile, unimaginative, uninspired, uninventive(adj)

deficient in originality or creativity; lacking powers of invention

"a sterile ideology lacking in originality"; "unimaginative development of a musical theme"; "uninspired writing"

unimaginative(adj)

dealing only with concrete facts

stereotyped, stereotypic, stereotypical, unimaginative(adj)

lacking spontaneity or originality or individuality

"stereotyped phrases of condolence"; "even his profanity was unimaginative"

unimaginative(Adjective)

not imaginative