Censored to avoid spoiler.

“Trevor” thought she was fucked when Mitchell got sent home but that’s actually what won her the game. Getting rid of a key ally for her made her less likely to win in others’ eyes, so she wasn’t a target for strategic downvoting. Meanwhile, with River and Courtney in the final, they were targeted in the vote because they were a remaining well established duo. And while Chloe came close, she had been consistently popular throughout the game, making her also a potential target for downvoting.

Trevor won by being well liked but striking the right balance so he wasn’t so popular he’d get targeted at the end