I believe she felt impervious to any of the problems that plagued her and her campaign due to the fact that she had the "D" by her name. She didn't see any way that a Democrat could lose to a Republican and was so devastated at losing after everyone sold her a bill of goods that there was no way she could lose that she couldn't even address her supporters to concede. The fact that she blew over Wisconsin and many others was just revealing of the type of person she actually was. She felt she was so much better than everyone else and that everyone else was beneath her except when she wanted or needed their vote then she would be anything to anyone in order to get their vote.
She was also assured that no matter what she was guilty of she would get the votes of the Hollywood elites and 99% of the media who actively shielded her throughout the campaign. Frankly I'm also surprised that she didn't win but I'm' completely thrilled that she didn't. Now watching these snowflake liberals and their reactions to Trump's victory even makes things that much better.