Good article, Matthew. But I see you are not asking the actual question How democrats can live in a nation that is not a democracy but just a two-party system?
It's an oxymoron to call oneself a Democrat and then not wanting this place to actually become a democracy.
Just so we are on te same page; it explains the internal wrangling on the left because the left is forced to coexist in a single party; the left competes with the left because divide-and-conquer is the essential aspect of our winner-take-all system.
Only one left can be represented, and that left must on top of that also try to outbeat the right for leading the nation. How silly is that?
The First Thing about Democracy:
Yes, we are not a democracy. The good news: we are also not a dictatorship.