I give a big Grandpa hug to you, your story is sad...but in the Western world started to be normal.
I think we have lost something on our way to be "successful", and more focus on the core family then the whole family.
This is not something that have started with you, but more back in the 60's when the way we brought up our children should be so free, and where their self was in focus.
I remember back to my father, who had 9 hours job, 6 days a week, wife and 5 kids, and still time to visit his family and friends.
With the introduction of TV, which we got in late 1950's, we noticed a big drop in the time we had for other family members, and visits started to be scared.
I have still 2 living siblings, but only one keep contact, the last one we must contact ourself if we want connection...there is very little contact with their children, due to the fact they we never learn them to know.
So yes...your story is sad....so is mine...but I don't think we are unique.
It is clear that what we learn our children is what they will to when grown up....if parents are good to create big family events there is a good chance that the kid when grown will keep the tradition.
So in a way...we parents are the one to blame....and to go around carry bad thoughts from disputes, and avoid family on that reason is direct silly, and only show that "our pride" is one of our curses
Well well...have another big hug...seems I put out my own frustration too
