Why try to change someone when you can just accept them as they are. If their natural instinct is to be idiots, immature and completely lacking accountability, noted. Accept it, don't argue with it, don't try to fix it, just understand it clearly. Then politely inform them you fully accept who they are... and will be enjoying that version from a safe distance. Because acceptance doesn't mean tolerating everything, it also means knowing when to walk away. Responsibility is learned, and more importantly, it's a choice people make for themselves. Some choose to stay irresponsible because they know someone else will carry the weight. So maybe surprise them for once, don't be that someone anymore. You've been there long enough, they've had their training wheels, time to remove them. And if they fall, well... adulthood hits all of us in the most messed up ways anyway, so maybe let it hit them a little too, emotionally of course.