In the article The Triple Talaq Judgement: A Sisyphean Achievement, Libertatem Magazine critiqued a ruling by the Supreme Court of India as:
But in essence, it is an equivalent of Sisyphean’s [sic] progress where
there is no real progress in the jurisprudence.
Triple Taleq, according to Wikipedia:
..allows any Muslim man to legally divorce his wife by stating the
word talaq (the Arabic word for "divorce") three times in oral,
written, or more recently electronic form.
The conclusion of the critique in the first link was:
Though the practice of Triple Talaq has been set aside, all the judges
fail to take notice or even address the colossal issue of gender
discrimination. Unlike the popular perception, this case
insufficiently moves in the direction of achieving gender justice.
Unlike a frog leap, it has advanced only a step in that direction.
Thus, in this article, a Sisyphean achievement meant a judicial ruling that seemed much more important than it was: it did not address the underlying problem.
A more homely example would be of raking leaves (which I am in the middle of). You have achieved, with much effort, a leaf-free lawn, and you admire your lawn and bask in the glow of your achievement -- but the underlying problem is that you have deciduous trees and it will all have to be done again next year.