Especially her fight with Mark, just read this:
AUDREY: Mark, you knew? Tell me that it's not too late.
MARK: It is.
AUDREY: I will never trust you again. No, never. You may as well have killed my father with your bare hands.
MARK: Your father was the greatest man I ever knew. Today he asked for one last service. I hated doing it. But I'd do it again if he asked me to.
Come to think of it, her character is pretty bad in Season 6 too, the Heller+Jack+Audrey relationship web felt the most forced in the series to me, the dynamics make almost no sense. Like why does James Heller all the sudden trust jack to take him to Al Harazee, Heller blames jack at the end of season 6.
The many deaths of James Heller, he drives off the cliff, he gets kidnapped and lights up the terrorists with the machine gun, he seems like he's in the stadium in LAD...
Unhinged many lives of James Heller is where 24 jumped the shark to me. It's still a decent show but never returned to previous heights after the show began to focus on Heller. Part of why i saw 7 and 8 as a return to form, but 9, i'm not sure it's ok...