I share your sentiment about the epilogues. I think what you're witnessing is survivorship bias, as they call it. People who were disappointed by the post-canon material jumped ship a long time ago. A lot of them probably stopped paying attention once the comic ended, but I think the epilogues in particular felt like, spiteful? Mean spirited? I'm not sure how to put it, but so much of their contents feel like an effort to make fans of certain characters as uncomfortable as possible, and I think that probably alienated a lot of people.

I personally don't find the themes of the epilogues very profound, I always thought Homestuck's metanarrative was one of its weakest elements and was better off just being a sort of running gag. In every other respect... It's barely Homestuck to me.