TheStreet's Action Alerts PLUS Portfolio Manager Jim Cramer said Yahoo! (YHOO) CEO Marissa Mayer failed at leadership. 'I think that she was not inspirational to people,' Cramer said, adding that while Mayer was right to invest in mobile and video, she was up against tough competition from Alphabet (GOOGL - Get Report) and Facebook (FB - Get Report) . 'These were really creative companies,' Cramer added.

At the time of publication, Jim Cramer's charitable trust Action Alerts PLUS held no positions in stocks mentioned.