This isn't true at all but it is diagnosed punitively in the way you're describing.
Which part of it isn't true? It's different from all other personality disorders because they don't have delusions. There's no hallucinations. It's different from other mental illnesses that could be controlled/effected with medication and is also not only resistant to therapy most of the time but actively harmful because it just teaches them to be better. There's no brain abnormalities. It doesn't prevent you from doing anything in the way OCD or even depression might. It doesn't create erratic, uncommon characteristics that wouldn't be seen normally outside of it.
BPD is being highly emotionally reactive. Who does that sound like, cranked up to 11?
Fear of being abandoned cranked up to 11, who does that sound like?
Saying horrible, horrible things about you when they feel slighted cranked up to 11, who does that sound like?
Spend all of their energy for years trying to get back at someone cranked up to 11, who does that sound like?
Picking fights over miniscule things even in super loving relationships, who does that sound like?
Impulsiveness and self-harming, who is that more common in?
Unhealthy view of themselves, who does that sound like cranked up to 11?
Wild mood swings, see above?
You think it's a coincidence it's essentially a woman disorder? ALL the "symptoms" are just typical attributes of women cranked up to a 100. If BPD was a strongly male disorder it would almost have more legitimacy simply because ALL of the symptoms of it are so non-typical of the average male. That's a pretty good indication something fucked up is going on. BPDemons are basically the average ex-girlfriend, worse. That's not a mental illness that's a shitty person (or a demon). There's also precedent for the DSM/etc to be wobbly like this. Look at trannies. They're now heckin valid and totally not mentally ill (or gays if you want to go back further). BPD is the same, in reverse. There was SO many incredibly shitty women acting super shitty, that they wanted a reason for it so it wasn't just "yea, a lot of women are shitty in this specific way". So now they got a heckin valid
excuse disorder.
Just realized something about this rotten witch: she complains constantly about people not letting her finish, but when she's alone yammering to herself like a retard, she will rarely if ever say a complete sentence; she'll get halfway through and interrupt herself to grunt or stutter or start a new thought, which she'll derail again. Christ she is loathsome
That's why they get cut off and why it's so frustrating. If Josh didn't cut her off she would LITERALLY never shut the fuck up (not that she does anyway) but she also never has a complete thought to spit out or is trying to develop it while babbling. So your options are 1. you try to say something (and then get screamed at) or 2. let her finish, by never finishing, and likely still get yelled at. Everyone gets annoyed when they keep getting cut off but at a certain point you gotta just STFU too