As long as hormone-driven human bodies persist on this Earth, people will continue dating other people. And as long as people continue dating other people, some of said people will prove to be incredibly annoying to the rest of us.
Note: "the rest of us." This dissection isn't meant to address the occasional jealous single person who finds a couple objectionable out of jealousy. These are the behaviors that unite the single, the coupled, the polyamorous... everybody in the same thought: "wow, they're kind of the worst, right?"
Instagramming each other through brunch
Aw man, look how happy they are! This couple has been dating all of three months and they are absolutely steeping in the sweet, sweet honeymoon juice that leaks out of every orifice when you find out you’re both "pretty into it." They haven't yet gotten to the point where they split their dishes with each other, because they’re actually too uncomfortable to eat in front of each other. The Instagram pictures are abnormally well framed and have nauseating captions like ✨ cutest boy ever ✨. Cute boy one moment, Instagram husband the next.