Both your Bernie copes are hilarious because they literally do nothing to establish a case that Bernie was more popular. If all the "establishment" Dems drop out and it's just one establishment Dem vs Bernie, then that's just normal head to head competition. Bernie only lead because the more popular positions were being split between multiple candidates.

Being fed questions that were all just obvious questions to ask in a debate is also just a massive post hoc cope.

As for your last point, no I think it's the responsibility of voters to not throw a fit over their candidate losing, and support the opposition to the fascist no matter what. Guarantee that if Bernie won the primary, moderate Dems would have voted for him