Trigger warnings for mentions of suicide and other mental illness. Spoiler warnings for season 3 of "Crazy Ex-Girlfriend".
Once Rebecca accepts the diagnosis, she goes all in on being the bestest patient. I think the show does a really fabulous job of straddling the line between being humorous and yet serious, and I think this season has really tested that. Rachel's borderline personality disorder is shown as serious, and yet, they also show how some of the tendencies and behaviors are the things that got her through law school and made her successful. The idea of your strengths also being your weaknesses is often explored in superhero stuff and only played for laughs, haha, that neatfreak, in other shows.
And, incredibly realistically, Rebecca's diagnosis doesn't solve her problems. It just gives them context.
The National Suicide Prevention Lifeline has both resources and a hotline with English, Spanish, and hard of hearing options.