reallly your view of her social network usage is your perspective and whether you're right or not about the rest of your analysis there is nothing to be handled here, if you've already given her what you think is the best advice that's all you can do.
I'm not sure how to say this but do you actually know here IQ?
NOthing more to do with it. if you feel strongly enough stop trying to change her mind and move on. Everyone has their own independent ability to choose to make friends how they see fit and whether each of us agrees or disagrees with how they are doing so it's not at all up to us. We can support people and advise but we can never change them ourselves.
Accept that your friend has rejected your advice and choose either to continue being friends or to move on.