That's only your headcanon, it's never been said anywhere. You're making assumptions.
From an interview: ZUN: As for that, I had wanted to bring a character from Hell into the story. A Hell different from the one underground. Though she's different from oni, she's just a normal goddess of Hell. In terms of status she's absolutely higher than Eiki. Eiki's a judge, but she's a part of a society of oni. However, Hell isn't limited to just oni. There are plenty of things we haven't seen yet in regards to Hell. And it would be easy to make new worlds if they wanted to. An infinite number of worlds can be made. All those mysterious aspects can be considered Hecatia's "Otherworlds".
There are also the Ten Kings, who are certainly superior to Eiki and the other Yamas. Eiki herself is just "one of the many" and was a jizou like many other judges, she isn't a unique existence.
I can't wait to see more of this hellish stuff in canon, it seems really interesting.
I don't think any of us should be surprised that Eiki's superiors are rapists. Hell's probably a very hostile work environment.
Why isn't this the exact right color, huuuuh!?This is a white line set onto your kneesocks, is it noooot!?Eiki-samaaa!? Have you validated your underweeeeear!?You're not wearing all Black and White!? Eiki-samaaa!?What kind of black is this braaa, Eiki-samaaaaa!?Eiki-samaaa!?Eiki-samaaa!?Komachi...
Save me...Eiki-samaaa!?