The phrase "fruitless task" means a task or activity that does not produce any positive or desired outcome. It is a task that is pointless or unsuccessful, resulting in no useful or beneficial results. Full definition
But tackling shame head - on is a difficult and often fruitless task. (businessinsider.com)
I shall not here attempt the perilous and fruitless task of prognosticating the stages, or the probable duration, or the terminal modalities of this inevitable unification of the human species. (religion-online.org)
Anyone who has spent any time building links will know it can be a time - consuming, frustrating and fruitless task. (searchmarketingstandard.com)