From the wikipedia article:
Unbidden, Assange brought up the case of Seth Rich. When asked directly whether Rich was a source, Assange said "we don't comment on who our sources are"
From the interview in question, Assange said (and this is a direct quote): "Wikileaks never sits on material. Whistleblowers go to significant efforts to get us material, and often at very significant risk. There's a 27 year old that works for the DNC who was shot in the back - murdered - just a few weeks ago, for unknown reasons as he was walking down the street in Washington."
Then, the interviewer asks Assange: "what are you suggesting?"
Assange replies, "I am suggesting that our sources take risks..."
Like, you don't have to be a fucking Mensa member to draw a logical inference about what Assange is suggesting in regards to Sith Rich. You say "the rumors of it being Sith Rich were propagated by the long list of bad actors." One of those bad actors was Julian Assange.
Not gonna lie, I expected you to double down and say that Assange's comments don't actually suggest he was insinuating Seth Rich was killed for leaking information to Wikileaks. So, have an upvote I guess.