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Chelsea Lazkani ’s ex, Jeff Lazkani , has hit his breaking point -- telling TMZ he’s done taking heat after two years of nonstop hate, swearing he and Chelsea were long separated way before those "Selling Sunset" cheating rumors started flying.

Jeff tells TMZ that S8 of the Netflix hit was built on a shaky foundation -- a random text from a total stranger claiming he made out with another woman at a hotel back in Dec 2023 -- a storyline he says turned him into a villain. Getty

Jeff categorically denies the whole storyline ... telling us both he and Chelsea tried to make their marriage work, but their love story eventually ran its course.

He says there's absolutely no bad blood, and they’ll always be tied through their two kids, who they share joint custody of, and he does

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