Bernie was one of many, not the most important.

The tangents are what you're asking for because you keep focusing on one prepositional phrase in a whole paragraph. The whole point of the post was the issues of the electoral college and how it causes a necessary two party system if it ever hopes to actually elect without resorting to the contingent election system which then gives the election to the house, where more representatives per person are given to low density areas, much like the electoral college votes are distributed.

I already answered how the primaries are unfair. Funding agreements are corrupt as proven by the data from Hillary's campaign. The party doesn't allow true primaries to occur in years with an incumbent president. And in other years, candidates that might be competitive are limited to one, or at most, two strong candidates one of which is more strongly supported by the party, despite there being many others who want to run (much like how Warren, Biden, and Hickenlooper in 2016). Keeping the others out actually benefited both Sanders and Clinton, but due to the power of money and the fact that those in the party had already decided on Clinton and actually had no intention or even an obligation to allow anyone else to win, it made it much easier to sabotage just Bernie rather than having to sabotage many candidates.

The fact that the parties are allowed to be biased for a specific candidate and have no real obligation to hold primaries, much less listen to them, and the fact that there can only be two parties, means there is no true democracy (representative or otherwise) by design. Votes are rarely for something, but instead voting against something and thus selecting the "lesser evil" that is selected by a small minority. This is the point of the original post. The primaries not being fair is just a side note, and not even part of the constitution, nor is it illegal for the primaries to be biased, so it's just obfuscation of the real issue. The fact that the electoral college creates a necessary two candidate system. That doesn't mean we have to have political parties, but we do, and those are corrupt, but outside of the purview of the constitution. No matter what system is put in place, it will always be no more than two options.