This sounds like what my H went through when he was losing his connection with me. He was isolated, didn't have many friends to talk to, was angry about work and the stupid people he had to deal with, and would take out his anger on my son for very minor things.
Then when I became depressed I felt very much like you describe your wife, she sounds depressed. It's hard to recognize because you think are dealing, when you really are not. She feels disappointed in people and you are the main target right now. She is speaking from pain and is not making a whole lot of sense right now.
Hang on to rollercoaster Dragon.
I know she's depressed. She does have IC, for what little it's done in the last nine months. She has justified moving out and even filing as her IC told her to do it. (Again, don't believe what she says right?)
As I gain my equilibrium, I could have held on to the roller-coaster for many more months, but I feel like her filing has put on expiration date on the ride. Depending on the terms, it might only be 2-3 months.