I don't know how you get from black Friday sales numbers to "Android is too hard for the average user." If you want to convince me that Android is too hard for the average user, you need to get some people who have never used either iOS or Android and then give half of them an iOS device and the other half an Android device, let them play with it and then later ask them to do some tasks like send an email, or other task and compare the success rate.
If you are going to show me sales numbers, my thoughts on the reason for these sales numbers is that Apple has greater brand name recognition. Ask people who do not own a smartphone and more people will know of or heard of an iPhone than a Android phone. When I first was interested in getting a smartphone, I have heard of an iPhone, but not an Android phone.