"Ho hum ho hum - why do newbies always (a) assume and get stroppy about some secret MN club "
Don't be mean, we all had to learn the ways of MN...even you.
"(b) assume they are always right"
Err, we all generally think we are right, what a silly thing to say
"Why do OW always assume (a) that there was soemthing wrong with the marriage or the exW"
OP has pointed out that she was not the OW.
If a man leaves a marriage something must be wrong with it, its simple logic. Whose fault is another question. And at no point did OP state the failure of the marriage was the the fault of the XW.
"not the prick of a lying man"
where is evidence of lying man?
" that they are so much better than the XW/P and it will never happen to them "
All I see is that the OP has provide her version in which the exw is behaving, in her opinion, bady since the relationship ended.
She also has clearly stated she makes no assumptions about how long her marriage will last.
Can't stand this knee-jerk sainted first wife, evil husband and witchy second wife scenario so often touted on MN.
Shit happens. And unless we are there we cannot know the full story of any marriage breakdown. There are people who behave badly in relationships, both men and women. And some who behave with dignity. And some who just need to end a bad marriage.