Rant: Dumbass client

I need to share my misery with someone. Hope you get a laugh out of this. About a year ago, I built a web app for a client. Let's call her Karen. She loved the UI; she loved the functionality - every meeting was a joy. She was shit-kickin happy. I have 10 months of emails from her saying stuff like "it's like you're in my head! You get it exactly!" She even paid me extra for new functionality that she came up with halfway through. Then, after I had delivered everything she asked for (and signed off on), I demonstrated the finished app to her and her staff, and I thought it went well. I kept asking her when she wanted to launch it - crickets. Then she called me two weeks later, saying that one of her employees was still using her old system and asking Karen why. Apparently, the employee said that what we built didn't meet her needs... no details. So then Karen lays into me and says that what I built her is worthless and we need to start over. This is just out of the blue; absolutely no complaints until then. She was literally screaming on the phone. My wife heard this because I put her on speakerphone. I told Karen, " Hey, I'm sorry, but you have never said you weren't happy or that anything was wrong. I can't start over. I have to pay my staff to start over. If we did something wrong, I would cover the cost - but I built what you asked for, and I have many emails and Zoom calls recorded where you were happy." Then I don't hear from her for about four months, and she sent me this nasty-ass email saying that I screwed her over, used templates off the web (not true), and she wanted $45k in compensation (more than she paid) - or - make up for it by redesigning her Claude designs for her other stuff. "I did it on the weekend in 2 hours, I don't know why you developers charge so much!" She would never win a lawsuit. I forwarded everything to my attorney - and he laughed. He said, "No way she can build a case. But try to settle with her and do what she asks; it's not worth