By the end of LOCH, East Heretic Wong Yerk See had come to accept Gwok Jing as his son-in-law because he realized that his beloved daughter Wong Yung would never be happy as the wife of any other man. That does not necessarily mean that Wong Yerk See actually *liked* Gwok Jing, however. To the end of LOCH, I got the sense that Wong Yerk See learned only to tolerate Gwok Jing rather than actually like him.
Early and midway through ROCH, that still seemed to be the case. Wong Yerk See left Peach Blossom Island because he couldn't abide living in the same household with Gwok Jing's teacher, Ohr Jen Ngok (Gong Nam Freak # 1). When he first met Yeung Gor a few years later, Wong Yerk See still referred to Gwok Jing as "an idiot." Only towards the end of ROCH did Wong Yerk See demonstrate anything even remotely like a genuinely respectful and appreciative attitude towards his son-in-law.
Did Wong Yerk See ever come to truly appreciate Gwok Jing, however, or did he, to the very end, merely tolerate the son-in-law who was so different from himself in so many ways?