Hey Travinator, welcome to the site. Super glad you found us, lurked, and then reached out. Relationships with pwBPD (people with BPD, whether they have a diagnosis or not) are exhausting and HARD. The more support you have, the better. Plus a sense of humor, which I think I'm getting from you!
Everything you mention in your post sounds familiar: Trying some tools but seeing minimal progress, setting boundaries, getting threats to do all kinds of stuff. Intrusive paranoia, no privacy, the roller coaster, the exhaustion, the anger, wondering if you really are crazy or the problem. You're definitely among people who get it.
Smart move to set this up through your work email. Though the person in my life with BPD traits isn't a spouse (it's my husband's kids' mom, FWIW), I still don't access this site on public home electronics, because the kids don't have the awareness yet to handle running across all this.
I just need a place to vent and feel safe about doing so.
This is that place, and more -- vent as much as you need to, it's a safe group to let out your frustration so it doesn't build up. You can also walk us through some of the key recurring conflicts that happened, in a "he said she said" kind of way, and if you want, we can give feedback on "hey, when she said this and then you did that, that was a moment you could try Z instead of X next time and see if that helps". Just to help it not get worse, so you can get some breathing room. Relationships with pwBPD are so high intensity that it's difficult to find time for YOU and getting YOU back to baseline. Something else we can talk about with you.
Thanks for reading this and I know everyone out there gets it
110%
Let us know how today has been for you, if there's anything you need to vent about, and what some key conflicts have tended to be -- whenever works for you.
-kells76