"In my mind, I knew [our relationship] was rough, but I didn't know it was that rough. It's just, like, I was doing such a worse job than I thought I was doing," Luke said during a Tuesday appearance on Married at First Sight: Unfiltered.
"To see that [footage] back, it's just, like, I don't know. It makes you feel like you can't fulfill that goal in life that you want so bad."
"You mean marriage?" Unfiltered host Jamie Otis questioned.
"Yeah," Luke replied.
Luke and Kate's marriage has been "a downward spiral," as Jamie put it on Unfiltered, since the day they said, "I do." And the majority of Married at First Sight fans have blamed Luke for their issues.
Luke was not attracted to his wife at first sight -- later admitting she's not his type -- and he never appeared to try to build physical intimacy between them.
And as the season progressed, Luke confessed to his wife he felt "repulsed" and "dead inside" when sharing their first real kiss after the wedding. He also accused Kate of having a drinking problem.
When Luke was given the chance to share his side of the story and explain his treatment of Kate on Unfiltered, he broke down into tears and had to remove himself from the situation.