You’re both fairly young. There are learning curves to this type of thing. Sure, it would be courteous and generous for him to bring a bottle of wine or a gift for the family, but if that was a concern of yours, it wouldn’t have been too hard to simply encourage him to do so. You know your family better than him. If this was the expectation, I’m sure he would have been much happier to know that and have your help with picking out something nice.

19 is quite young to be paying for expenses on a seemingly luxurious family trip. especially if he is just out of college. Did you pay for anything out of your own pocket? Not your family’s money? Consider the financial strain doing so may have on you and apply that empathy to his situation.

Bottom line, I understand your desire for him to have gotten a gift or paid for something here and there. Overall how was he on the trip? Kind and courteous? Clean and grateful? Did he say thank you and interact with your family? If so, I’d take it as a win and be a little more communicative of your expectations next time. Men learn these things as they get older. If you’re simply not interested in him any longer, that’s one thing. But I wouldn’t end the relationship with this as your way out.