I think that Bernie hurt Clinton as much as anything because I know quite a few Bernie bros that voted third party because they just couldn't vote for Hillary.
How is that on Bernie? That's entirely on Hillary for being a historically horrible candidate and the DNC for pushing her regardless. Politicians are not entled to your vote. They have to convince you they are the best opition and motivate you to vote for them. Hillary's overwhelming sense of entitlement and corruption, and yes, her lack of likeability, is why she failed in such a dramatic and historic way.