This is how I felt about it, too. It wasn't a criticism of Beyonce being "too broad," it sounded like it was just a criticism of Beyonce's 'supposed feminism.'
I've taken a few women's studies courses back in undergrad, and yes. Apparently this is a thing/idea that is discussed.
To put it generally... very generally... women's suffrage began for white women only (and really, only upper middle class women). Throughout stages of feminism, traditionally the focus has been on middle to upper class white women (straight).
It's changing now, but many people do feel like white, middle class & + women, do like to tend to try to only look out for their own interests. Many people also feel like these same women are really fond of telling all the women not like them how to behave.
It's definitely an idea present in academia. I'm not sure how popular that idea is yet outside of scholarly essays.