Are Amazon/Apple the only places to buy used or refurbished Apple products? Or even new? Does the Apple/Amazon agreement hinder the sale of competing electronics, such as Microsoft's Surface, Google's Chromebooks, or Samsung's Galaxy phones? No. You're still able to buy Apple products in any form and condition anywhere on the internet or at retail in bigger cities. You're still able to opt for a competitive device with similar functionality as well. In no way does this stymie your ability to do either. Unless you're a seller, you're likely unaffected since you still have plenty of legitimate options, and sellers will just migrate to other sites like eBay. Individual sellers have online classifieds and apps like letgo.
Again, this is not a consumer friendly move, however nothing about this is monopolistic. But then again this board called Disney a monopoly for regaining ownership over its own IP.
No more than google stans chanting about how it's okay for that company to market and sell every ounce of personal data you may not have even consented to because "Gmail is free"