This probably doesn't need to be said, but that thread is staged, or rather, the response to the thread (negative) and the thread itself was real, but the OP was obviously trolling when they made it.
There is no "Japanese pedophile Vtuber!" using that avatar. The reddit user was "maxexx" and renamed themselves "ChinChinVtuber" for the troll, the user was
promptly banned both from that subreddit and reddit as a whole, the art was lifted from some random guy's art twitter, and the account was fake and never went anywhere. No relation to chin x chin vtuber, which is a newer small Japanese vtuber group.
That meme was so forced and obviously fake that it annoyed me enough to look into it when first started circulating online.