Lisa Vanderpumphad a tough year — and it definitely affected her time onThe Real Housewives of Beverly Hills.

In PEOPLE’s exclusive sneak peek at Vanderpump’s appearance on Monday’s episode ofRuPaul,RuPaul Charles‘ new daytime television talk show for Fox, the O.G. Housewife opens up about the experience.

“It was such a brutal season for me, and it was at a time where I was floundering,” she admits. “Everybody always says, ‘Oh, you look like you’ve got your life together,’ but I started that show this season like, two or three months aftermy brother passed. I just wasn’t in the right space.”

“I actually did say, and we talked about it withAndy [Cohen]onWatch What Happens Live —he said: ‘I wish I’d given you the year off,’ ” she recalls. “I just wasn’t as prepared. I found that I couldn’t deal with something that I could normally deal with. So then it just went on and it was accumulative and in the end I just said, ‘I can’t do this anymore. I just can’t.’ ”

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Lisa Vanderpump RuPaul

Lisa Vanderpump RuPaul

PEOPLE confirmed earlier this month that Vanderpump, 58, isofficially walking away from the Bravo showafter nine seasons. The decision came after the restaurateur had a major falling out with her castmates.Kyle Richardspreviously confirmed she and Vanderpump, once inseparable partners in crime,haven’t spokensince a blowout fight at her mansion. The drama began over a dog thatDorit Kemsleyadopted from Vanderpump’s rescue center and then gave away. Now known asPuppy Gate, the scandal has dominated this season’s storyline.

While Vanderpump continues to appear on the show, she stopped filming with the rest of the cast about halfway through the season.

And three months before filming even began, Vanderpumplost her brother Mark to suicide. The Bravo star previously said she wished she had taken a break from the show after experiencing such a devastating loss.

“I wasn’t as prepared for combat as I should’ve been,” she said. “It hasn’t been a good situation.”

“I think this year, with where my mental state was — and I’ve been very honest about that, I struggled a lot, you know, after my brother’s suicide,” she continued. “The first few months it was really difficult, and I was kind of searching for happiness, so, I think you know … when something really significant happens in your life, maybe it does change you, you know?”

source: people.com