I love well-written creepypasta. I love terrible creepypasta even more. This is how I live my life.
My personal favorite bad creepypasta is a little ditty called
The Deadsun Myth.
It's a tale of wisdom and wonder, where a young man from a made-up town wth an anachronistic nickname that is immediately invalidated by his turning into a ghost monster after all his DNA is replaced with ectoueasnone (ecto-ease-none, geddit? ...I... think?) and the narrator's grampa nicknames the resultant scamp Deadsun, for no apparent reason, as Deadsun has no dead-sun-like traits.
He is totally unstoppable, even by religion masters, until AK-47s are invented, and even then, with AK-47s "and others" he respawns every day. And then a large, but not strictly daily, number of "wars" are fought against him until the modern day. The end.
No moral!
It was probably written by a kid, or somebody with the writing ability of a kid, so I can't be too hard on t, but oh man, I love it so.
Also, as for why Jeff and Slenderman are eroticized by fangirls? Some ladies just can't get enough of bad boys, including monstrous serial killers or literal monsters with murder tentacles and no face. I can't explain it, I just know it's a thing. See also: Sigourney Weaver continually proposing that she has a sex scene with the xenomorph.