I think they mean, you could have neither bought nor pirated the content, knowing that the terms Discovery is offering are very one-sided (I am presuimg the lic

I think they mean, you could have neither bought nor pirated the content, knowing that the terms Discovery is offering are very one-sided (I am presuimg the license agreement explicitly stipulated that they were allowed to do what they did). Either way, when one party breaks their contract, you sue them in a court of law. You don't seek remedies on your own.