When was he forced? You're ignoring the entire reason people are "lashing" at him, he wasn't forced and still acts shitty about it while demanding money... He arbitrarily chose to bring a child into the world for money and immediately childishly tried to write up a "contract" on basic paper to try and skip out on his half of the responsibility of bringing a baby into the world without realizing that a paper isn't legally binding. They had already talked out the "rape", it was an accident and Dojin apologized and MORE than made up for it by treating him so well and paying him for the baby, but he still decided to treat Dojin like trash.
http://www.mangago.zone/read-manga/love_is_an_illusion/uu/love_is_an_illusion-chapter-23/13/
To those who lashed on Hyesung for not wanting to look at his baby, try getting into an unwanted pregnancy where you are forced to keep the baby at 19. Try that.