CRM the issue?
I see the captain was given more CRM training, after many f/os refused to fly with her. I wonder if these f/os were asked why they were requesting to be excused. Was it cockpit manners they were worried about, or cockpit skills?
In my experience as both f/o and captain, I was always far less concerned with a grumpy partner, than an incompetent partner. If an awkward colleague could be trusted to perform a safe flight, I was more than happy.