Not ignorant. Granted, immature, but not ignorant. If that's what she's into then that's what she's into.
And, let's be honest, if the N64 came out today it'd be laughed out of the room. Nostalgia changes people's opinions of things very much. Nothing annoys me more than people who constantly spout how much better the NES is than everything on the market combined. I will say that there are quite a few older games that I still hold dear, but I'm not going to cling to the past, shaking my cane at all the young whipper-snappers and their fancy new 3D TVs. But I digress, because everyone is entitled to their opinions. Even if I disagree.
I'm guessing the girl is fairly young. She just needs to learn proper communication skills, because, unless she was kidding around, she sounds like some pissy kid.