Parents of teenagers

As the mother of teenagers (18 and 16), I have a hard time with certain behaviors: giving notice at the last minute that they won't be coming home to eat, their overall lack of anticipation, their grumpiness because their parents have their demands... I often feel angry at them and at us (my husband and I) because I feel like I've missed out on things in their upbringing... even if they're not devious in truth. I'm also often disappointed; I would have liked them to be perfect, of course. All these emotions, combined with the fact that their departure is approaching, are a bit of a drag on my day-to-day morale. I'd love to have some videos on this subject!