Oh, she's not entirely without fault in all this. She's one of those young whippersnappers who doesn't know her manners.
But a response of "HOW DARE YOU USE POOR MANNERS WITH ME. LET ME TALK TO YOUR EMPLOYER, AND NOT EVEN ADDRESS YOUR COMPLAINT." is frighteningly douchey.
It's on the level of people on the internet who point out grammar mistakes in other people's posts, and assert that they're in college and you're probably just some 13-year-old so they're way smarter than you and don't need to even address your arguments because your arguments must obviously be faulty and inferior to theirs. Basically, someone whose logical fallacy level is unusually high even by GameFAQs standards. (Side note: I love it when someone tells me they're probably smarter than me because they're in college. Oh, you want to get into a credential war with ME, do you?)
Below the average standards of GameFAQs really isn't how the head of a company should address a complaint.
Speaking of people who should have taken things private, why didn't THEY go private with "hey, next time could you please avoid swearing--sometimes my kids see my Twitter". Why did this need to be in their public response? (And in fact the thing they publicly responded with instead of addressing the issue).