Not her specifically, but the DNC worked against Sanders and for her. All that came out in the Wikileaks emails, most likely courtesy of the Russians.
Keep in mind though, that Hillary was such a deeply flawed candidate that she lost 23 primaries to an aging Jewish socialist with a strong Brooklyn accent, although Superdelegates gave her six of those states back at the convention, with one tie.
I still predict that the Repubs will try to come up with a variation on Superdelegates to try to avoid a repeat of the 2016 primary debacle. Unfortunately, the base now is so firmly Know Nothing that it won't work.