Synonyms of unhelpful

2 Syllables
pointless, random, wanton, aimless, vacuous, goalless, drifting, idlest, worthless, needless, fustian, empty, feckless
3 Syllables
meaningless, floundering, designless, purportless, senseless, haphazard, unplanned, hit-or-miss
4 Syllables
desultory, purposeless, nonsensical, motiveless, good-for-nothing, irregular, disobliging, unpurposed, undirected
5 Syllables
unnecessary, unprofitable, unsupportive
6 Syllables
indiscriminate