Yeah, that was a freaken gorefest. Really, I prefer some of the darker gore stories though, like the Apple Sleep Experiment. I tried written horror like that and the closest I get is gorefest not even scary.
Ha, the irony of your post. There was fanfiction post in the early years of the show that featured the pink one carving up that rainbow maned pony's organs in order to make cupcakes.
Now as the show has ended the fans of the fic made a sequel featuring the pink one's daughter in carving up her father too. Just some very overly dark shit.
https://www.deviantart.com/lordofthefeathers/art/Apart-of-The-Family-829048134
The "safest one" I could find featuring a very stuffed father with the pink one and their child.
Really, the show isn't that bad, outside of it's very rushed final season. Give the show a try... just be careful where you thread in its fandom.