Aww yeah, anonymous sources cited in the article - let's play everyone's favourite game of "fuck this journo" and name them!
"But chosen families are not necessarily spared the strife that can plague any family. “I felt very conflicted with the fans,” one Buffy actress told me. “I didn’t have the same feeling about the show, but I also know sometimes people don’t want your truth.” She believed people hadn’t been ready to hear about what Whedon was really like on the set. “There was a cult of silence around that sort of behavior,” she said."
Sounds most like either SMG or Hannigan to me - Trachtenburg can't string a sentence together without using emojis like some kind of brain-damaged zoomer, Carpenter is widely documented as having spoken out about it, Felicia Day and Eliza Dushku are too compromised so never would and that only leaves Amber Benson, considering her entire career before and since was a whole heap of nothing, it seems unlikely.
"A sort of cult of personality formed around Whedon. Once a month, he would invite his favorite cast and crew members to his house. They would hold Shakespeare readings in the amphitheater that Cole, an architect, had built in their backyard. “It was like being part of this little family,” said an actress who was in the inner circle for a time"
That's got to be Amy Acker, due to how many Whedon projects she's been involved in.
"As for Whedon’s claim that he doesn’t threaten people, an actress on Angel told me that hadn’t been true back when she knew him. After her agent pushed for her to get a raise, she claims Whedon called her at home and said she was “never going to work for him, or 20th Century Fox, again.” Reading Gadot’s quote, she thought, “Wow, he’s still using that line.” (Whedon denied this too.)"
My money's on Elisabeth Röhm - goes from being a main character in S1 of Angel to completely written out and spends the next 4 years in the Law & Order ghetto.
TL;DR, journos can't protect their 'sources' for shit.