Unix is the answer, but only if you phrase the question very carefully. Unix is user-friendly. It's just very selective about who its friends are. Unix: It's not just 'User-Unfriendly', it's 'Proactively User-Hostile' !
On the twelfth day I left it, my Unix gave to me: Twelve boards a-blowing; Eleven chips a-smoking; Ten ports a-jamming; Nine floppies frying; Eight gettys dying; Seven blown partitions; Six bad controllers; Five core dumps; Four bad blocks; Three heads crashed; Two faulty tapes; And a burnt-out V.D.T. On the thirteenth day I started adapting my Nintendo for the VME bus.