Are you seriously using an example of one poorly-run caucus as proof that the whole primary was rigged? I mean, I can use Tylenol to prove that all medicines are deadly poison, which is exactly as accurate.
I like Bernie, I really do. But it turns out that the easiest way to win a primary is to have more votes, which means you have to be more popular than your opponents. Polls for Bernie and voting results for Bernie were pretty close to each other, and both showed that he was never as popular as Hillary overall. He won a few small states, and lost more large states. With predictable results.
It's always more comforting to think "the person I like was cheated" rather than "the person I like lost"; just listen to the equally wrong "rigged against Trump" rhetoric now. But at some point you should stop believing every conspiracy theory and start thinking about the facts.