I believe they probably did because it is hard to troll oneself and they are liberals. They probably saw extremism on their side as normal so when trying to create fake news stories that tricked the left, they couldn't be subtle but over-the-top. They (as other similar sites) were successful with the right because they were subtle in their approach. Making the fake stories sound believable.
There were a few that targeted Bernie supporters that I see get tossed around... like one that tried to convince Bernie supporters that they could write him in on the general election ballot.
That was part of the problem; most of the grassroots supported Bernie, and it was the political machine that foisted Clinton upon the Democratic Party. Another part was that Trump really didn't have much of a network to attack the way Clinton did... plus, most of the dastardly stuff about Trump was, in fact, true.
The last part, I think, speaks to differences in the way liberals and conservatives consume social media. When it comes to news stories, conservatives seem to prefer mid-length, fully written news articles. Liberals prefer to put their falsehoods into memes and shareable images. Take a look at the Standing Rock temper tantrum, and all the lies being spread about that. Or, perhaps, Occupy Democrats, a notorious Facebook fan page.
