The DNC leaks make it rather clear that it was indistinguishable from the Clinton campaign. This is a problem for anyone who actually believed that there should be more than one candidate with the chance to win.
Trump's speech called out Hillary as the candidate of a rigged system. And that is exactly what she was. The DNC's level of involvement was obscene and outrageous. More to the point, it had already been decided that no opposition to Hillary would be allowed.
That's the definition of a rigged system. And it is what the system is still doing for Hillary in the general election.
Hillary is the candidate of a rigged system. And this elections voters will decide whether they want a rigged system or not.