Royal road. I still have the book up but I haven't posted a chapter in a while. Thinking about deleting it. It was doing well but the reader base is very quiet.
Oh, RoyalRoad is way bigger than Scribblehub. Readers in both sides have preferences of course, so they are both picky in that aspect, but I'll have to say that RR is more vocal and critical, and kinda harsh if the genre is not suited to the taste of the majority. As others have stated, you got tags that RR hates. And yeah, your story is not suited to the mainstream preference of people in RR, I suppose you might have better chances here in SH.
In any case, just write the story you want. I post my story in RR and SH, and it took a long time to gain traction because I was doing something against the general expectations of webnovel readers. But a year and a half later, I got a small readerbase that liked my story. So, if you want to write something, just do it, but also keep in mind that you'll only have few readers if it's not the mainstream genres.