You find it fascinating I find it to be expected, inevitable, even natural.
When lives crumble and families are blown apart, how do you think people react.
Much of the time it seems to be for nothing, no perfect ending, no wonderous replacement relationships, just destruction and hearts broken, wives, children, grandchildren, in laws but hey isn't it interesting, in a corny sort of way.
How the guilty like to minimise and make the injured party feel humiliated and small minded.
The thing is, as time goes by the anger does diminish but the logic and justice of the situation increases and you recognise badness, through and through, and those people you think will just forget about what has happened, just like op, will find they have to do an awful lot of burying their head in the sand and ignoring painful conversations as the years go by.
Guilt has a habbit of getting heavier as you age and you will carry this for a lifetime, maybe others will quietly remind you as the years go by.
The pain of affairs is outstanding, the ending of unions, partnerships, shared parenthood and love is indescribable, you either survive or die, some fortunate ones will recover but there are many that will just cope but one thing you learn is that there are some really nasty people in this world and they are the ones that should run togther, but for some reason the bad ones always want to run by the side of a nice one, maybe so they can keep on abusing, I don't know.
So your flippant attitude to love and loyalty in the end really does you no favours, especially if you're a woman.
The nice ones end up running out as you age.