The angst voiced by some leftist Cincinnati Twitter users is expected, but any objective observer could see this play coming. There is some risk to it. There could be a revolt, but pissing off a bunch of leftists who were not going to vote for the full Democratic slate of nine candidates is not going to affect their election chances.
Leftist activists have been mostly pushing either a short ticket voting strategy or just voting for a list of long shots and Dillingham. What I think is driving the angst is that many thought she would win with an endorsement. She would be the leftist "voice" on council. I think with a Dem endorsement she would likely win. Without the Dem endorsement, it will be much more difficult. If she starts running against the Democratic Party or other candidates, she won't help her chances much. If she runs as the Leftist candidate, she won't help herself much, either.
If Leftists did not grasp how the Issue 3 vote went or how the 2020 election went for leftist views, then I don't see how they can be anything other than a loud fringe group, bent on destruction as much has their right wing opposites, willing to bring down everyone for a fantasy.