Just days after the harvest festival of Chuseok, one of South Korea’s two major holidays, Kim Jin-ju decided she wanted a divorce.“I was just done living as a punchbag for my husband to let out his frustrations on,” the mother of two said.She is one of a growing number of women walking out of their marriages in the country, which now has the highest divorce rate in East Asia and ranks 14th among Organisation for Economic Co-operation and Development (OECD) states for divorce, with China in 27th…