My English might be bad, but
i dont give respect to this language I will try my best
Some points quite shared with artist and indie game developer in general with similar question. Anyways, what counted as "Success" is depend on you.
Ok! *Clap Hands* Now we are random developer, driven by passion. Not insanely popular, but you have some followers, maybe friend too.
0.
Luck crossed with timing, both should work together. You might got blessed by all mighty
Je-- algorithm, but if timing said "but you not gain much interaction from this", you will not get much. This part makes reason why there are some underrated/less known artist. Or game developer in this context.
1.
"To Parody, or Not To Parody",
It's quite easier to make H-game parody due to existing audience, hence easier bump to exposure. But if you not going to make parody from anything, don't worry, at least you have more freedom to character design, but need more effort to exposure your original game, especially if you haven't build your community yet.
2. "
Audience and their Fetishes"
You can't force every single audience to like your work as one genre may have lower interest than others. This also applied on public forum and community.
3.
"Consistency! also followed with
open to critic and always
communicate with community."
We speaking from non H-game like Subnautica or No Man's Sky as example, their early release isnt that good, mocked by players even, yet they open their ears to fans and they become good game. This also applied to you. Your fan give critics, discussion, or idea? take the notes and learn from it, Apply that to your next project.
(Note: You dont need to strictly follow every single one, choose what's the best and do that)
4. "Make your game at least
enjoyable"
Mainly about bug, and other technical part, or aesthetic, maybe. Go figure.
This should be on early point, but since we speaking of H-game, hence we need more CG scene, the priority will be lowered
5."
What make MY H-game stands out from others", say you want making H-game with
uncommon genre, or interesting story, or good artstyle that hooked more people, or this game is so
Hardcore, or make it comedic (and/or) so ironic enough so that people will makes meme from that, or other factor. Dont stressed out if you cant see it, your fans might can see that
---
TLDR: Luck + Timing gives biggest bump, but you can still build your own "success". Just keep your effort to consistently make game that are enjoyable, hear your fans words. Eventually you will score one.