After seeing that this was written by the author of redo my hopes for a cute no romance or yuri isekai went straight out of the window, there are to many crappy harem isekais already, like nearly the rest from this author.
I guess I give it a try and read the already 6 chapters of novel which I have found, as this half chapter and chapter 0 from the raw side seems interesting enough.
Imo the low ranking is because chapter 0 wasn't translated and so the whole isekai and world exposure part is missing and we are thrown straight into to much, and for others also probably redo flashbacks^^