I think what’s REALLY pissed some people off is that Hillary Clinton played to win. Of course she and her team took every advantage they could. If you’re not campaigning to win, why are you campaigning? Should she just have laid down and let Bernie win?
Bottom line, that’s what they’re really pissed about. She dared to keep campaigning for the nomination after Bernie got in the race.
A big majority of Democratic voters chose Hillary over Bernie. There it is. It’s not rigged and it’s not complicated.