The Jschlatt and Quackity dynamic in fanfic, from what I've waded through, tends to orbit a really specific emotional axis. It's less about fluffy romance and almost entirely about raw, volatile power dynamics. You get this intense cocktail of rivalry, betrayal, and a weird, twisted form of respect that borders on obsession. It's all the post-egg arc tension from the Dream SMP dialed up to eleven, with writers exploring the aftermath of that political and personal rupture.
A lot of the emotional weight hinges on the push-and-pull between genuine, buried affection and the sheer need to dominate or outmaneuver the other. The angst isn't just 'we can't be together,' it's 'we destroyed each other and maybe that's the purest form of understanding we'll ever have.' You see themes of legacy, of being haunted by each other's choices, and this bleak, cynical co-dependency that somehow feels more binding than any sweet confession. It's exhausting and dark and honestly, sometimes after reading one I need to go look at pictures of kittens.