Married at First Sight star Chris Williams has lashed out at his Season 12 co-star Jacob Harder for Jacob's repeated criticism of him on the series' Unfiltered discussion show in a lengthy social-media rant.

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Jacob hasn't held back when expressing his negative opinions of Chris on Married at First Sight: Unfiltered, which airs Wednesday nights on Lifetime ahead of new Season 12 episodes and features different cast members weekly.

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Jacob called Chris "a dumbass" and "junior high" among other insults during his several Unfiltered appearances -- and now Chris is firing back!

Chris, 27, unleashed his fury on Jacob in a series of since expired or deleted posts to his Instagram Stories, according to screenshots published by Monsters & Critics.

"Its a known fact that when your segment comes on people don't care because your ass is boring!" Chris exclaimed on Instagram.

During the March 3 episode of Unfiltered, Jacob suggested Chris was acting like a child when he allegedly whispered flirtatious things into his wife Paige Banks' ear after asking her for a divorce.

"Sorry, Chris, but get the hell out of junior high school with this sh-t!" Jacob said at the time. "Come on, man. Like, what are you doing?! It just doesn't make any sense... Just grow up man, that's bush league!"

Chris wrote to 38-year-old Jacob, "Oh yes I am a 'child' compared to a guy who graduated in the 80s. I would have [looked] past your ass too."

Chris made fun of Jacob for accusing Haley of not looking at him during conversation or being present with him during outings on a recent episode of the series.

"'You looked past me,'" Chris recalled Jacob saying. "'After 4 weeks we don't ever have to see each other again.' You were mad lol."

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Jacob also bashed Chris for buying his ex-fiancee Mercedes Myrick a brand new Mercedes Benz vehicle when she was pregnant during filming  and Chris was still married to Paige.
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"[He is] a dumbass," Jacob said on last week's episode of Unfiltered, which also featured Season 12 star Erik Lake, who got into heated arguments with Chris early in the Married at First Sight season.

"First of all, you got her a Benz, dude?! Come on!" Jacob complained, as Erik cracked up laughing. "You're married, like, give her a [Chevy] Cobalt if you're going to get her a new car."

"A Ford Taurus!" Erik suggested in agreeance.

"You're giving her a Benz?!" Jacob continued in shock. "You're telling your wife right now that you don't give two sh-ts about her and you're going to get with this chick [Mercedes] after this is over with. That's what that message says to me."

In reference to the car comments, Chris wrote on Instagram, "You were talking about the car I bought. At least I had a car to offer."

"The only thing you had to offer was some old ass woody boots from Toy Story. And a beach in your backyard while playing Phil Collins on a lovely summer night," Chris ranted.

"I hope I make you mad! I don't [fear] bullies. All of the people in this season talking the most sh-t have dysfunctional marriages. I now have a therapist."

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Chris seemingly went on to bash Jacob, Erik as well as Erik's MAFS wife Virginia Coombs, whom Chris called "a drunkard" on the show multiple times during a heated disagreement. (Virginia wanted to make sure Chris was treating Paige right during their Las Vegas honeymoon, but Chris felt Virginia was butting in and expressing "fake concern" at the time).

"I don't need advice from the alcoholic's anonymous club and the guy with a time machine to the 80s, a fake ass pool, and boots that looked like they are holding on for dear life. (Rip to those boots)," Chris wrote on Instagram.

"I just knew you had to have a perfect marriage after you had so much wisdom for me. Apply that to yourself?"

As Married at First Sight fans are well aware, Haley and Jacob's relationship appears to be headed for divorce.

Not only has Haley admitted she's not attracted to Jacob and feels no connection with him, but she also recently confessed on Unfiltered that she didn't even like his personality or understand his sense of humor.

In turn, Jacob accused Haley of not being vulnerable or open, and he didn't think she was putting all of her effort into the process. He said they'd have to "get struck by lightning" to like each other and turn things around.

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In a subsequent series of posts on his Instagram Story, Chris decided to provide "some context" to his ranting and raving.

"I didn't go on a rant just to go on one. Week after week you have something crazy to say on Unfiltered, Jake," Chris explained.

"I don't watch it. But it was sent to me. I just don't understand how the people with drama in their own marriages are commenting [on] me."

"I mind my business when it comes to your business," he insisted. "But obviously you are using my marriage to cope with why your wife didn't like you and your old ass boots!"

Chris added, "Find out why your wife don't like your corny ass! [You're] the only one in the room who laughs at your jokes! They ran from your clown ass when they saw you coming!"

And finally, Chris managed to get in one final jab, adding, "Bring your ass back from the 80s with that fake ass pool!"

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While Haley and Jacob's marriage is falling apart on the show, Chris also determined on the latest Season 12 episode of Married at First Sight that he and Paige weren't connecting despite their attempts to bond.

Chris alleged that Paige only wanted to communicate and hang out with him when cameras were rolling.

Given Paige had felt emotionally unattached for a while and was essentially hanging on by a threat at that point, the pair decided to part ways and stop trying because their relationship simply wasn't working out.

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About The Author: Elizabeth Kwiatkowski
Elizabeth Kwiatkowski is Associate Editor of Reality TV World and has been covering the reality TV genre for more than a decade.