Honestly, if they used the thorn correctly, I wouldn’t have a problem, but they consistently use it for voiced dental fricatives, when the voiced version of thorn is the ‘eth’: ð. (Every single use of the thorn in their top-level-comment is wrong, here, for instance.)
Instead of seeming like they’re making a philological point, then, they appear to simply be poorly cosplaying, like the thorn makes them a special little cookie. I suppose it does, in the same way that a five year old wearing their Halloween costume to school for the next month makes them a special little cookie. Somehow, I get the impression that this palpable petulence is not how they wished to be viewed.
This is an AI slop Spam Bot. Every single post it has made in the last two hours stops in the middle of a sentence, with each comment being at best sycophancy, and at worst a total non-sequitur. Everyone should report this spam from an undeclared bot account.