That's not a website you would normally want to go anywhere near. It is a forum where stalkers and creeps go to obsess over and make fun of the lives of people who aren't public figures.
That's hardly unusual for people who've been on the internet for a long time, and is something that we as a society are going to have to learn to deal with better than we do at the moment. People change, and dredging up stuff that people posted years ago is more than a little bit sad, and deeply unedifying for everyone.
I'd never heard of Kiwi Farms before today and, honestly, I could cheerfully have gone my whole life without knowing about it.
I started reading the thread, then skimmed the responses further down and was, basically, appalled. This website truly does plumb the depths of mental depravity. It's a cesspool of lazy, warped, corrupted thinking.
Wikipedia has a pretty good overview of what you're getting into there: https://en.wikipedia.org/wiki/Kiwi_Farms
As such, I would regard any perspective on byuu shared on that site as highly suspect, and I certainly wouldn't use it as a yardstick by which to assess him as a human being.
Right: I think it might be time to go and disinfect my eyes and my brain.
This forum seems focused on hate and trying to harm people.
Even 4chan /b/ is friendlier.
In the end, all that matters to them is if they get a good laugh out of it, as it always has been.