What has Mayer done, apart from revoking the work-from-home program? Yahoo had revived its potential 3 years ago when they made a lot of good PR abut bringing in a high-profile CEO (plus, sorry, diversity, which could bring new creativity and new hopes).
It almost sounds like they failed at integrating a new employee, and since this employee is the CEO, they failed at taking life-changing decisions to reshape the company.