Viewers saw Doute and Kennedy go through a drama-filled affair during VR's season three and four.
After their messy split, Doute, now 35, found love with photographer Brian Carter.
But she's still apparently bitter as an interview with Daily Mail Australia shows.
Doute said fans can expect to see her take on Kennedy on the upcoming seventh season of Vanderpump Rules, which focuses on the Sur restaurant staff.
"I love to take down the bad guy and I will stop at nothing, so sorry James Kennedy! He is my target and I will continue to make him my target until all is well in the world--until girls are no longer called fat and bad names," she said.
"Just the way that he treats human beings in general, I just think that he's such garbage."
But is the feud just a way for Doute to get more camera time?
As Radar has reported, Doute, who has appeared on the Bravo hit since the first season in 2013, was downgraded to friend status by producers, a show insider said.
According to the source, Doute's new stable life with low-key beau Carter had become boring. Transgender Billie Lee replaced Doute as a regular, an insider told Radar.
Now, Doute is stirring the pot by telling Daily Mail that she has DJ Kennedy blocked on social media and that she refuses to even be in the same restaurant as him.
"He's such a bad, bad person,' she said. "There have been times where his stupidity and ego can be entertaining on the show, but I feel like and I really hope that everyone changes their mind this season.
"James digs so deep that he wants to hurt people, and that's another kind of evil."
Doute also bashed Kennedy's current girlfriend, model Raquel Leviss, as possibly "dumb."
"Their whole dynamic is just super odd to me," she added.
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