> I am a consumer who has purchased an internet service package that advertises 100Mbps down, 10Mbps up,

You purchased a package that gives you access to your ISPs network at that rate. Not even the highest business packages will provide an end to end SLA unless you're paying for a leased line from your location to the location you want the SLA for. Once your packets leave their network they have no control.

You're only purchasing access to their network, and their network happens to be attached to other ones. If they weren't connected to a network with Netflix, you wouldn't have any recourse because you're not buying a connection to every computer on the network. Of course, practically they provide access to every site. But that's not what you're actually paying for if you check your contract.