The doctor on Crazy Ex Girlfriend telling the main character not to Google borderline personality disorder because of the disorder being misunderstood is problematic.
For one thing, it forces the character to rely solely on that doctor’s ‘expert knowledge’ on her condition. Googling BPD has the potential to introduce her to other individuals with the diagnosis sharing their stories of recovery or how how they coped with various circumstances.
But more importantly, it was the medical expert knowledge that constructed that misinformation about borderline personality disorder. For decades (centuries!) individuals diagnosed with mental illnesses that professionals wrote off as untreatable or as having poor prognoses or that made the person allegedly difficult to deal with or unreasonable have fought those professionals to change their dire views about such people and diagnoses and thus, our collective narrative about them.
This doctor is (inadvertedly–the writers simply don’t know this history) cut this character off from the very forces that allowed them as professional to see this diagnosis and others like it as not the end of that person’s life.