FYI - writing this is probably against the terms-of-service of CH. However, that can’t exactly be enforced against the scraper, if they scrape only a few articles, and don’t log in, and maybe use an anonymizer ( a service that directs your traffic through other servers ).
Then the question of how to upload an entire thread. Someone familiar with discuss could opine.
NOW - the legal bits. When you post to a site, part of opening an account is USUALLY a terms of service that states ownership transfers to the site. If so, CH owns what we all wrote, almost certainly. Or it could be a “permissive license” where they get ownership and we get ownership. If the TOS is the latter, pasting in HO (regardless of tech) is A-OK.
But if the TOS transfers ownership, pasting to HO would give them reasonable legal status to sue - especially since they can claim harm, decreased traffic - and shut down HO. Unless you can read the CH TOS - and read it covering the time you posted as well as now - and can make a clear legal case to yourself that CH does not own copyright.
So — my personal opinion would be to let it go. Such is the nature of social media, just start posting to a better place.