The rosary is optional not obligatory. Does not help me so I do not pray it. I see no virtue in any one way of prayer. or in continuing when you are aware that it is of no benefit to you. It can become obsesssional
If by “no benefit” you mean, no immediate gratifying feelings, then yes, that can be the case a lot of the time. But there are great benefits from praying the Rosary whether you realize it or not. Just do a search for the Fifteen promises of the Rosary for specific examples.
Here are four people who have presented the case better than I can:
“The Rosary is the most excellent form of prayer and the most efficacious means of attaining eternal life. It is the remedy for all our evils, the root of all our blessings. There is no more excellent way of praying.” -Pope Leo XIII
“The Rosary is a powerful weapon to put the demons to flight and to keep oneself from sin…If you desire peace in your hearts, in your homes, and in your country, assemble each evening to recite the Rosary. Let not even one day pass without saying it, no matter how burdened you may be with many cares and labors.” -Pope Pius XI
“Among all the devotions approved by the Church none has been so favored by so many miracles as the devotion of the Most Holy Rosary” -Pope Pius IX
“Some people are so foolish that they think they can go through life without the help of the Blessed Mother. Love the Madonna and pray the rosary, for her Rosary is the weapon against the evils of the world today. All graces given by God pass through the Blessed Mother.” -St. Padre Pio