If you're looking for substantive change, you are not going to find it in the Democratic or Republican Party. At least a small handful of conservative types may actually be getting served well by the GOP but they're rare enough. If you identify as a leftist, you can't say with any intellectual honesty that the DNC is aligned with any of your ideals besides socially liberal causes that have absolutely nothing to do with making corporations and private billionaire citizens poorer in the process.
Obama talked like he was Mao Zedong but governed like a more palpable Dubya. The modern Dem has no redress for economic inequalities that can't be explained by one's genitalia, skin tone, or sexuality. While I certainly hope for better compassion for those folks, the DNC lost this election because the middle America that would vote for them hears no convincing platform on how they'll help them. Trump and the GOP deceived these people and will make their lives worse quicker but the DNC really had no plan other than to ignore the gradual decline of this country's laborer class.
The GOP takes crap but the DNC of Clinton (which we have lived in since the 1992 election) is just as guilty in the destruction of this country's middle class. Ignoring the decline while making sure the boardrooms look more like college recruitment brochures is not a fix. All the Dems of Clinton have given us is a secular version of the prosperity gospel: "look at this gay/black leading a company, see the American corporatism model is not broken!"