Russian disinfo campaign about the Dem primary being stolen, hacked, rigged?

Remember all the crying about the Dem primary being stolen by Hillary and the DNC from Bernie Sanders? This complaint really drove a wedge between Bernie supporters and Hillary voters. I STILL see every day people on Facebook and twitter talking about the election between stolen from Sanders, or that it was rigged.

Remember this report:
https://drive.google.com/file/d/0B6J1ecILnk3UUy1KZ2FUT29iQ1E/view?pref=2&pli=1

Democracy Lost: A Report on the Fatally

Flawed 2016 Democratic Primaries

------------

This was passed around endlessly on Facebook and here as PROOF that the Dem primary was rigged.

What I'm specifically wondering if this report was a Russian propaganda operation.

It was put out by Election Justice USA, which has a website that is still up. However the material only covers the late Dem primary and hasn't been updated since June 2016.

The group itself is shady .here are no names on their website.

Their are some names on the report, but it's not clear who these people are.

This guy looks into some of the names: http://sacredcowwursthaus.blogspot.com/2016/09/election-justice-usa-my-ass.html

http://electionjustice.net/press/
In their press section, they refer to a couple of people. Lulu Fries’dat seems to be a real person but not clearly affiliated with the group. There's a "spokeperson" named Shyla Nelson.

What really raised my suspicions is a link to an Youtube interview with the Young Turks with their "spokesperson" ... except the link goes to "Chthe'ilist - Le Dernier Crépuscule (2016) (Atmospheric Death Metal)"

So the group seems a little suspect, and I always thought it was weird the way the report came together so quickly during the campaign, was clearly inflammatory and sensationalized.

So again-- could this group have been a Russian propaganda operation?

And a related question is how many "Bernie supporters" who promoted this meme online were Russian trolls?