Well, at least in the states where they didn't succeed in keeping everyone else off the ballot.
There was no real primary. Even 2020 wasn't a real primary. The fix is in with mainstream media and the major outlets taking their queues from the establishment.
The idea that we have an actual democracy is laughable, and the Democratic party does everything in their power to keep it that way. Biden won in 2020 because the establishment picked him and the media did as they were told. There is no democracy without an independent press.
Biden is a better choice than Trump for a multitude of reasons, but not saving democracy.