They are reminded of how often they were the one wrong and stupid and should have apologized and didn't and then they just want to live somewhere else on the planet so they aren't reminded and feel guilty some more.

Maybe.

I have never had a mutual & amicable break up.

Not all women do. Generalizations can be tricky. I think it’s best to speak about your own experience. Have all of your exes ceased communication with you? Why does that bother you?

I think it's because their nature is to bring everything they got to a relationship and when it's over, their nature dictates that they have to take everything away. The next guy will get the lot. At least for a while. Because I think it is their nature, I don't doubt their sincerity.

And why do you think that's true of all women (or men) ? Because it's not.

I have no idea what other women do, but when I end a relationship, I end it completely. Finito!

to take care of themself i would imagine don't dwell to much on it

No reason to hold onto people after the relationship has run its course.

Why do men pine for women they couldn't/wouldn't keep is the other side of that question.

Emotional attachments are hard to break,Women dream one day of finding the "One",later finding out it wasn't so,would be my guess.

Why do men group women together when they’ve only been exposed to a sample size too small for statistical analysis?