If you’re saying that Sanders should have gotten the nomination and that the primaries were rigged, consider…
— Clinton beat Sanders by three million votes. That’d be a LOT of votes to rig, and surely ill-gotten votes would be discovered by some media outlet, for sure.
— Also, the primary process is mainly run by the respective states, which would make it very hard to tamper with them. Yet, that’s where Clinton got most of her wins. Conversely, the caucuses would be where someone who wanted to rig an election would have better luck (still tough, but…), yet that’s where Sanders got most of his wins. If the DNC rigged the nomination process, it did a horrible job.
Which is to say, the proof isn’t there that the DNC rigged the nomination process.