Gina is understandably traumatized from how Bojack abused and strangled her, and she is justified in her discomfort around stunts etc.
However I noticed on my latest rewatch some possible B Plot / subtext on her journey - when she’s finally the star, she’s standoffish and rude to those around her (separate from trigger moments - while she’s in safe spaces), and she reminds everyone she gets to do that because she’s first on the call sheet. She’s the star and that’s her privilege as such.
I get the impression that Gina has internalized all the abuse she’s endured throughout the industry generally as her ‘rite of passage’, and now that she’s a star, she feels she is entitled to berate and bully those around her as she was herself throughout her own career. Which sucks.
No she isn’t, she has trauma from what Bojack did to her and she had to cover it all up because no one can know, in her mind, that she was really strangled. So she plays off her actual PTSD trigger episodes as being an entitled actress, because she can’t have anyone know she was just the girl who got strangled by Bojack.