This is a very short-sighted interpretation of the "break up Facebook & co." campaign. It is not about Facebook per se, but about the surprising power of tech giants - do you use Google? How about the internet?
Don't think this is a real issue? How about looking at some of the other "real" problems she's addressed in her platform before outright dismissal? The kind of impulsive, single-issue voting you're implicitly advocating for here is exactly what the country does not need.