“Big Brother 28” star Mallory Aurichio feels most betrayed by Drew Campbell following her emotional eviction.

“I’m surprised about a lot of the stuff that Drew has done,” the 24-year-old rocket scientist exclusively told Page Six on Monday.

Aurichio called out Campbell, 22, for playing both sides of the house and “running information back” to the “Icons” alliance of Dee Valladares, Rick Devens and Angela Murray.

“I always knew he was tight with the ‘Icons’ and I knew he talked too much, but I had been kind of assuming he had my best interests and he didn’t,” she said.

Additionally, Aurichio said she assumed Campbell was most loyal to their “FAP” alliance with Barrett Pfeiffer and Melody Morris, so she was just as surprised learning that the surgical dental assistant told Kamu Kirk that she was targeting him.

Given Campbell’s deceitful gameplay, Aurichio thinks he doesn’t have a great shot at winning the game.

“Even though I think Barrett has been doing similar things as Drew, he’s still playing a much better game than Drew,” she told us.

“I can’t even really put the words for the differences, but people really don’t like Drew,” Aurichio continued. “But people still trust Barrett and Barrett showed me loyalty in the end.”

But of all the remaining newbies, Aurichio said Yash Patel is best positioned to be the winner.

“Everybody likes Yash. He’s very good at competitions and for the majority of the game, everyone kind of assumed that Yash was working with them, even though he wasn’t,” she explained. “He was on the block first week and then he hasn’t been on the block for a really long time.”

As for the three “Icons,” Aurichio said Devens “has been playing the best game” because he’s “very smart and calculated and he’s made a lot of big moves.”

However, Aurichio acknowledged that the trio have had an easy ride since the beginning of the game.

“They definitely did start with a little bit of an advantage,” she said. “They were the only ones that could compete in the first HOH. And then all three of them were voted into the time capsule.”

“Coming in as three ‘Icons,’ you kind of have an alliance already formed, and Dee and Devens knew each other outside of here,” Aurichio added. “So they definitely did have some upper hands.”

“Big Brother 28” airs every Wednesday, Thursday and Sunday at 8 p.m. ET on CBS and is available to stream the next day on Paramount+