Well, they are brothers.
Chan Ka Lok is supposedly the main hero whereas QianLong is the main villian of "Book and Sword". The only version I have seen is Book and Sword 2002 with Vincent Zhao as Chan Ka Lok. He is not very likable but definitely not hated. If I remember correctly, he did not convince Princess Fragrance to be with QianLong. He did not give her up to make a deal with QianLong.
I know series can be very inaccurate comparing to novel. Did Chan Ka Lok give her up in order to make a deal with QianLong? How accurate is Book and Sword 1976 compare to the novel? I hope TaiSeng will eventually release that series in Viet. There are so much great song that I really like in that series.
Who is more hated? QianLong or Chan Ka Lok?
From the Poll, it should be"Hate them both" instead of "Hat them both"
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I think somehow Jin Yong hates/dislikes QianLong while biases in favor KangXi so that he made QianLong as a villian in Book and Sword while made Kang Xi as a hero in Duke of Mountain Deer. Honestly, between the two, I like QianLong much better. QianLong's life is much better than KangXi's in almost all aspects.