I can tolerate jank (when cheatengine is too much hassle); I'm aware that the indie h dev types probably aren't approaching these games with the mind that it gets food on the table. If there's any defense to it, it's that designing for the voyeur is for later—the subscriber's there for updates and they get them—with no promises for how fap—or gamer—friendly the update gets. Even then, there wasn't any promise of victory H with the sumo boss. I gather it's a bragging rights thing.
I didn't encounter any soft-locking. I exited the game after saving just before the boss, and it takes me to the same save point just before the boss—no restarts
-rambling from here-
As the dev, they can just enjoy their aseprite/photoshop/whatever-builder-software loops at their leisure so looking at H isn't even a concern—I infer for them it's making something work in the first place at all (and just being happy that they've even managed to make something for a hot second looking at
Kyrieru,
Kosmic91,
umai-neko,
musfan/aoinanaya and other..."暇-hobbyists", as opposed to, say
eencya or
Hinayua or who seem to have their circles professional and figured out likely from past work experience—and any extra hands they can find), which is a fair distance away from being able to sell something, let alone be worth subscribing for (...let alone sailing for). It's probably in there somewhere, but buried in other priorities. Dick-brain isn't the same as Inspired-from-game brain, which is also different from artist and programmer brain.
This isn't the most annoying game to me to be frank. I had no patience to sit through hitting all the adds (probably the intended way to play) and died a bunch ignoring them into to purples leading to hitstun loops, but the boss isn't really someone I concerned myself with beating since the only H scene I saw available from that was their block grab...
but even with that, and granting that I decided to try to beat them just now I can see that the health does seem needlessly padded. (it took five distracted tries, but just like regular mobs, just don't overcommit attacks and stay near the middle, you could probably get away with half-second slow reaction time assuming you're staying the first two barrels' gap away. When in doubt quick jab).
More annoying are the ridiculous crawler enemies in
Fighting Girl Yuri (0.44 last played), but even that doesn't have H locked behind a saveless thread (and the game is easy to manipulate to DIY). At least Sekiren makes me feel like I'm making the mistake for a risky play than janked out because the hitboxes are ridiculous.
In any case, if Sekiren is unrecommendable/too egregious to support there's always
Princess Reconquista to fill the gameplay niche