If you can get to a place where her words and actions have little to no effect on your psyche and feelings, since she was at one time the biggest part of your life, then the rest of the people you come into contact with will have absolutely no impact on you no matter how poorly behaved they are!
I'm like 85% the way there. Compared to BD1 where I was like 5% lol It's true, survive this, and everything after will be piss easy.
She pulled another trick, applied for child support just before my trip. I had to spend two hours out of my work day with the agency to create an account. I discovered, of course, the information she provides wasn't correct. So there will now be a dispute process I have to follow. The process didn't upset me but it was an annoying distraction. I did learn thought that in IHS, she'll end up with practically nothing anyway.
On the plus side, I'm looking at 2 weeks free of narcissistic abuse.