Yes and the American people voted for Trump over Clinton, that doesn’t mean he won due to his popularity, he won because he exploited a broken system, same as Clinton exploited a broken system within the DNC.
Clinton’s primary win is not evidence that she was overwhelmingly popular, it’s evidence that democratic voters was misled about Sanders (who we both supposedly agree is a better candidate). Clinton voters are low-information, a condition that’s fostered deliberately by the DNC and Democrat-aligned corporate media, because if they didn’t decieve people those voters would understand that Sanders is actually someone who would work to deliver the things that benefit all of us.
If you actually think Sanders is the better candidate then you should agree that most normal people aren’t aware of why. On the other hand, if you think Sanders lost fair and square and democratic voters voted with full knowledge then that’s basically just saying you think progressive policy is a failure on its own merits.