ElleBlue and Spinning-I am sure you two are fine bosses. No one should have to hold an employee's hand, but there are very crappy bosses out there. If you go back and read the letter see where the LW says after the boss gets so hypercritical it stresses out the employee and she does poorly.
Luckily, I have never been the target of such, but I have seen it done to others. This one woman I worked with was the target of the boss's wrath. Why? She was basically doing her job because the boss was too incompetent to do it. I would guess jealousy? The boss started leaning on her all she could. What happened? The employee made more and more mistakes.
The rest of us could see who really knew what she was doing-the targeted employee. We did as much as we could to cover up any mistakes. That kind of pressure will screw you up. Lucky for this woman-she found a much better job in an organization that does have a much better human resources dept. We sort of did, but it was a joke.
I would tell Cinderella to first try to grow a thicker skin. You won't last anywhere without it. For some people, I know that is difficult.
If I were the LW, I would be biding my time until I could get out of there. I have had some awful bosses, but I was not a target-they were shits to everybody. What I did was just grin and bear it until I found a way out.
That would be my advice to the LW. Put on blinders until you can find another job. If the boss is as she says, there is little need to talk to him. If her co-workers are not rallying behind her, they won't start now. They might be relieved she is taking all the heat.
I would just focus on doing my job and putting out resumes and applying elsewhere.