Have you thought that maybe she just doesn’t like your carpet?The most angsty cat in the western hemisphere has finally agreed to meet halfway in sorting her issues with crapping on the carpet out. I'm now starting to be able to figure out when she gets frantic so it's a good step on the way to success.
She's still very lonely though and keeps mooching around. Though we give her lots of fussing and care.
Contemplating finding another gentle and friendly cat friend for her. They say kittens are a good option as female cats often mother and look after younger kitties. Have to see if there's any in need of a forever home in the area.