Thank you all who replied above.

Does anyone else agree, with my thoughts, and feel the same ? Or at least understand ?

I'm not niave enough to think fb tells the whole story, but my point is EVERY SINGLE ONE had photos and comments from friends showing a HAPPY LIFE. It wasn't one or two photos, but long time lines of events, trips, holidays, birthdays, just their lives in general, some very mundane sounding. But they ALL had the one thing in common. HAPPINESS.
They are settled, in their lives.
( sounds boring maybe to some, but at my age, 52, I want settled, secure, content. I want to look forward to my old age ! )

Or do you think I am a miserable, unkind, ungrateful, old witch ? And I deserve a good slap !

I feel the way that I do. Period.
Therefore, I may not agree with your point of view, but I do nonetheless want to hear it ! Thank you.