Similar word to undeserving:

base, beneath, blamable, contemptible, degrading, disgraceful, dishonorable, disreputable, good-for-nothing, ignoble, improper, inappropriate, ineligible, inexcusable, no-account, no-good, not deserving, not fit, not good enough, not worth, nothing, offensive, out of place, recreant, reprehensible, shameful, unbecoming, unbefitting, undeserving, unfit, unmerited, unseemly, unsuitable, valueless, vile, wretched, wrong