You seem to understand that the vast majority of Americans simply vote for what they see in the media, meaning that only a candidate backed by the media can win, and you seem to understand that we can't shift the media with our current government, but you don't seem to understand that, given those 2 facts, there is no way for us to recreate the phenomenon seen in other countries with a larger proportion of people willing to look outside of their televisions and smartphones.
For a 3rd party candidate to win a modern-day American presidential election, either the media would have to validate them, or tens of millions of Americans would have to, in unison, spontaneously decide not to follow the media that they trust implicitly without question.