A question of "Angst"

I think I might be missing something when I am reading...... but I just don't get the concept of "Angst".... Now I don't think this is a British stiff upper lip thing, I think it might actually just be me.

I can come with the concept of plot lines where bad things happen to characters and their is much drama and woe, though admittedly I do rely on the author to sort it all out by the time we get to "The End".  Maybe it's me, maybe I don't invest myself enough in the stories. Maybe I just don't get that connection with the characters... maybe my mind is just very slightly out of kilter with everyone else.

I see time and again book recommendations and reviews, even comments about authors that refer to "Angst" but actually, just what the hell is it exactly??

I have googled (as one does) and see that there are in fact numerous definitions, and in fact a whole load of gumph about the fact there is no definition of it....... The nearest I can work out is that it's to do with anxiety, worry and dread... but when reading, is this what I should feel about what might happen next or is this what the characters are portraying??

When I am writing, I am pretty sure I don't write "angst"... I know I can do emotional (or so I've been told....) I know when I've accidentally killed off characters (yes, accidentally, I never start with that intent, it just sort of happens occasionally) I haven't felt that it's been particularly traumatic but my beta readers have said that it is.... again is this me, can I just not connect with the characters, even my own  (okay admittedly half the time I am writing I kind of feel like the character is talking through my hands and my own input is pretty minimal)

Maybe I'm just not an angsty person.... I shall try harder to find the angst to see if I can work out what on earth I am missing out on.