Hi,
and good Morning, nice thread and food for thought and discussion...
No, I don't think your envious, I think it's more maturity/experience....when we're young, we think only about ourselves, and our own problems....but as we grow older, we begin to open our eyes to the fact, that we are invincible and life is short, and start to pay attention to others...some young people have this perception since when they were small, other's acheive it through experience, and others, never get it....the more they get the less happy they are, the more they complain and want more....and it probably bothers you, because they are family and they refuse to see the forest thru the trees....
So, be good within yourself, and allow they're lives to play out the way it's supposed to, and keep a lot of duct tape around, in the event you are tempted to say something again...as you now know, your wisdom will be less then appreciated....see, there is something for you to learn in this event, as well....we're always learning, are we not?

Learning allowance/not getting involved and just listening is a hard task...especially when you care about loved ones....and it hurts when you see them be so ungratful...so, don't fret...just keep practicing...LOL
Hugs
Creme