She was hired for her expertise. Then punished for it.
HR refused to offer support or protection as her leadership position and credibility were dismantled and she realized she was going to be pushed out, whether or not it was fair or justified.
Someone had to pick up the slack. That was her job too.
The less qualified male hired over her recommendation missed deadlines, skipped meetings and was given every grace she was never afforded. Someone had to pick up the slack. Apparently that was her job too.