My problem was Bernie selective criticism of stuff that disadvantaged him while being silent on those advantaged him . Thus , why he create this evil narrative about Closed Primaries while he was completely silent about how Caucuses equally restricted the vote . You also had his campaign fostering dismissive attitude towards states he lost while championing those he won even when they were remarkably similar . Thus , some supporters whined and attacked the idea of Southern states having such a strong voice in the primary because they are red states while ignoring his own red state wins . If he is so morally opposed to the Party and the person that he had to know was likely going to be the eventual nominee than he should have not run in their primary . He shouldn ' t have taken their resources and then turned around to use the platform they gave him to damage their brand . Moreover , I lost respect for him for his blatant hypocrisy in criticizing her for her lack of transparency in refusing to release unprecedented materials in search of something to hit her on while he refused to release his tax returns which has precedent . I also think it was pretty dishonest for him to continue to solicit campaign donations while promising far fetched means about he could totally secure the nomination while he obviously had to know that wasn ' t happening . In my opinion , it is clear that the campaign went to his head and want to secure more influence for himself during the platform writing process no matter what damaged he caused dragging the race on longer than needed .