I wonder because the author put so much rape into it.
The goblins rape.Her teacher raped her when she was a kid.
She left or was let go after growing up and not being his fetish anymore, then she got raped by party members, multiple times.
And in the middle she lost her family, twice, first when they sent to a teacher thinking it wa sa good boon, then returning to the destroyed hometown, and if we want 3 times with a party she believed in falling down.
I presume she is getting this kind of focus because the story needs at least one main heroine, but one with this past is extremely rare.