Dear Elsa: Have you ever done anything romantic for Ingrid? (Her Heart/Ingridverse)

Okay first off, let me start by saying I mean no offence and the opinions expressed are mine alone. If you don't want negative feedback then look elsewhere!
I don't understand why people like this so much? I actually have read a bit of the story, and I thought it was... well... a little gross to say the least. You see, I love what your write Olof, and I like you a lot as a writer but. At one point durring this story Anna and Kristoff are in a room, and they are kissing, and you go into detail about Anna and Kristoff having sex, while Elsa is masturbating to the sound. That, actually physically hurt me. Like were we suppose to enjoy seeing Elsa's heart ripped apart and Anna's virginity being stolen by Kristoff of all people???? I just don't get it! That breaks my heart and we are suppose to like it?
And then I skip ahead to see if it had a good ending, also faintly recalling when Olaf pulled an ice rose out of his butt and Anna thinking of it as a turd and what? That's a stretch right there if I say so myself. But it didn't have a good ending. It wasn't even Elsanna.... Like.... wtf? Tagged Elsanna. But it's Elsa x Oc, and then theirs bit's of Kristanna? There is nothing in there that makes Elsanna actually the endgame or focus on the story! What makes this Elsanna even? If it has so many other relationships, it's almost like just reading a plain ole Romance Novel where none of the characters really relate like you think they would. Why isn't this story posted on r/frozen? I mean... HELP!
Help me understand how people who love Elsanna to death, and get so happy when they seem them together they squeal, like the fact that Elsa get's her heat broken, and she then romances another girl entirely? And so does Anna? Wha-... how can any Elsanna lover like that!?
tl;dr: If people love Elsanna, why do they like this? Please, shed some insight on how people like reading about their OTP splitting apart, and falling in love with other people? I love you Olof, but I just don't get it...

/r/Elsanna Thread Link - ask-ingrid-hanna-andersen.tumblr.com