
Nope. And nope. Your logic has a lot of flaws because first, Kwon Jiwook didn't remember what he did to Park Juyeon because of an accident and Park Juyeon didn't tell him that he raped him when they were young during the unceasing tortures. Second, how about other rapists who raped Park Juyeon along with Kwon Jiwook? They didn't get any punishment for their wrongdoings. Third, how about those rapists who raped Kwon Jiwook despite him doing nothing to them? They didn't get any consequences for their actions either.
I'm not excusing Kwon Jiwook by no means. What I'm saying is, this is not the solution and Park Juyeon could have just killed Kwon Jiwook instead of raping him for umpteenth times, making men raped Kwon Jiwook and kidnapping him for months.
He clearly grape someone to be treated like that. The revenge must be at least logical according to the action. This is controversial, but if it's true.. he sow what he reap. Hate rapist to the core and they deserve the karma. If you think that's cruel, then yea that's the point. They did the same thing at some point, without any provocation