Haha, well, like most erotica writers this person is really trash at it. None of them are clever enough to write an actual story, especially about superheroines. The dumb, bad end stuff is so fucking prevalent and none of it is good.
To be fair, the 'superhero-writing' bar is quite high, with most writers sucking hard at it. Not easy to give reality-bending powers to several people and keep a certain balance without erasing the whole planet. You gotta know quite a lot of science, and give enough 'weaknesses' without making them look like debuffs, which requires quite the writing skills. Now add to that that you're most probably working with a single free hand, and yeah, kinda understandable that most erotica of this kind 'is fucking awful'.
That's a good point, honestly. And to be fair to everyone, I bet most people think of erotica as less meaningful than the proper stories so there's that too.