Disability papers are not a get out of jail free card you can just wave around GROW UP. The fact that you even managed to attend college is proof enough that you grasp the fundamental social contract between one human and another and the rules, laws, regulations, and understandings such a contract has.
Put simply, if you threatened him with an act of violence, he's well within his right to press charges and they might or might not materialize into something.
Your Apple fanboy status aside, the tech is actually right.. the AirPort Extreme is capable of supporting 50 MAC addresses simultaneously. That number, however, has no bearing on the real world application of such a device. It means, that in theory you could connect 50 devices to the router and it shouldn't crash, it doesn't mean that you can start streaming youtube to all 50 devices and expect it to work.
But having taken some college computer science and networking you would know these things, you would also know that a single network point to service all of those devices just isn't going to cut it, you should really be using a mesh type network to relieve the strain on the internal resources of the router.
You're at small business levels of connections and you're blaming the ISP because your home level hardware isn't up to the task.