When you face bias from healthcare professionals, keep shopping until you find someone willing to treat your actual issues.
For having BTDT, I know it can be way much easier said than done.

After much searching and many disappointments, I found an orthopedic surgeon willing to treat my pain seriously and didn't fuss about ritalin.
The only moment she brought up the topic was when she wanted to check if nerve pain was a side effect. Otherwise, she treated me for the actual reason I came into her office, namely the foot pain ; not for the so-call-psychological-pain.
She tried avenues that other docs never tried, and she showed a real will to fight against pain and not against her patient.

She took account of the PTSD explaining that I won't show much when I am in unbearable pain until I am fully comfortable, but she didn't use the PTSD as an excuse to dismiss pain.

Finding the right doc was discouraging, draining, but it did worth the effort : it changed my life for the better.
It also says that to get good healthcare, we need to stop putting doctors on a pedestal as if they were above-human first, then considering the research for a doc as if we had to find a catering company for a marriage.

And even when we don't pay them, the collectivity pays for the doctor. If the doctor does not treat you with basic dignity because of his bias, your health issue will not go away by itself. Instead, it'll get worse.
So, the small issue cheap to treat will become a bigger issue with expensive complications to treat for the collectivity. Then, when an insurence company or Social Security wonder why healthcare is so expensive, part of the problem is having to put up with doctors unwilling to treat you seriously because of their personal bias.
So, next time you are blamed by an insurance company or Social Security because "patients like you are such a useless burden", you have the right to answer that doctors' refusal to treat because of bias increases healthcare costs (no matter how they react).
You have the right to refuse the blame on your person because of systemic issues.

You have the right to report denial of care because of doctor's bias. In such a case, keep evidence : keep any written element, any voicemail message, and you have the right to record sessions in the office. If the doc is unhappy, not your monkeys, not your circus.

The more you know the laws in your country, the better you can stand up against doctors.
Calling BS for what it is has nothing delusional, no matter what some doctors can tell you.
Their fear of knowledgeable patients is all about their own insecurities and incompetence.