The 27-year-old reality TV star took to her Instagram stories on Thursday night to talk through a few home truths with her fans.
Explaining that she'd been watching re-runs of her MAFS season on YouTube, Jess said she cringed at what she'd seen.
"I watched some videos of myself, and, yeah, no wonder you guys hated me," she confessed.
"I cringed looking at that just then, I cringed!"
Admitting her behaviour on the show had been at times "disgusting" Jess went on to reveal her shame at one episode when when Mike Gunner had the truth box, and was about to ask partner Heidi Latcham a question - and Jess laughed.
"What is wrong with me?" she said to followers.
Next up she said she watched the episode where she asked Dan, who she'd only just met, whether he loved her.
But it sounds like her self-indulgent YouTube session may have been the reality-check she needed to understand why she'd become one of Australia's most controversial TV stars.
"Married at First Sight got me looking like an ignorant child. I was an ignorant child. I'm disgusted!" she confessed.
"I was watching it cringing. I don't know if I've grown up since the show's ended, or if I just turned into a monster while I was filming, but that is not me," she explained.
"I don't ever want to be that person, ever again."
"Thank you guys for all pointing that out over the last few months, because I didn't understand, I just thought... Man, that was bad."
Bad-girl Jess recently confessed to New Idea about the surgeries she's undergone, confessing she’s had $50,000 worth of surgery since MAFS ended.
As well as veneers, lip fillers and cheek fillers, Jess can now add a breast lift to her surgical rap sheet.
Last month, Jessika had a $16,000 autologous fat graft, which took fat cells out of her problem areas and redeposited them into her breasts.
“I put some weight on during MAFS and after eating healthy and exercising, I had a bit of weight loss. Also with my break-up with Dan there was a lot of stress there as well,” Jess told New Idea.
“I chose the fat from the underside of my thighs. I had this little pocket of fat, I don’t know what it is, no matter how much dieting I do, no matter how much exercise I do, I just couldn’t get rid of it.”
The one-hour procedure turned Jess’ B-cup chest into an impressive D-cup, while removing unwanted fat cells from her thighs and bum.