Man tells woman she is attractive ... Another woman interprets this as sexism
It might be an inappropriate time to say it, but this is rudeness, not sexism. How often is it that you are talking to someone, anyone, they comment on how attractive you are and you are sorely offended? Never? Because I know from my personal experiences (as a highly privileged cis male of course) that I love being complimented.
If we are to interpret every single unrequested compliment as sexism that feminists will soon find that they are unable to find a boyfriend.
If you want an example of sexism, then here is one, from the very fingers of the feminist news reporter herself: "that she looks like a woman but acts like a man." Why should any woman need to act like a man? In this day and age do we still believe in these traditional gender roles, that only a man can be effective in a leadership position?
And then some victim blaming: "Mayer didn't [...] [goad] the "dirty old man" with some low-cut top or skimpy outfit [...] But, of course, you weren't even wondering that, were you?" No, as a matter of fact, I wasn't. That comment was an unnecessary attempt to read the mind of the reader. At no point did I assume that this respected member of her community would be sat in her shareholders meeting wearing a bikini or a v-neck down to her stomach.
Propaganda, the lot of it.