I think HN readers remember a bit more about the state that Yahoo was in when she took over (hint: not good.) I personally viewed her job as managing the divestiture of the valuable part of the company (Alibaba) in such a way that it delivered maximum value to the shareholders of Yahoo. I think she succeeded on that front: the market was probably undervaluing Yahoo's other assets, and she was able to sell those to Verizon for a fair price after divesting the Alibaba stake.
tl;dr: Yahoo was long dead before she arrived. WSJ readers forget that. HN readers don't. Plus she's an attractive woman, which will always paint a target on your back as an executive.