We have no doubt that the behaviour my son shows is intrinsically linked to his ASD, but if I were to have an honest frank discussion right now with our (ex) CAMHS therapist, I'm sure she would say we were hard to work with because we were set in our beliefs, they also had the opinion that if we could only work on our relationships we would see an improvement etc etc etc, pretty much what the CAMHS posters have said on this thread.
And this ^^ is what was so fucking frustrating. The belief that we knew nothing.
We have spent the last few years working bloody hard, on our own, to get to a point where we have something nearing a family life, instead of the hell life was whilst doing the parent/child relationship in the normal, strict boundaried, acceptable way. We were attacked by ds2 several times a day, he was in meltdown constantly.
His ASD/PDA diagnosis was such a relief, made so much sense, and the strategies work.
We know that how we do things works for Ds, we are not set in our ways needlessly.
Perhaps the therapists at CAMHS are so jaded by some parents, but with us, they would not accept anything we said.
We know how to get the best out of our DC, and we were clear that we have strategies that work.
We wanted support for ds's suicidal times, which are directly linked to school (with OT diaries and reports as evidence).
Because the therapist couldn't see any of this behaviour (because he masks), they decided we were yet another family making shit up, dramatising our home life, being crap parents but lying through our teeth. They wanted us to bring our discipline methods into line with school's, cos, you know, he's perfectly fine at school (masking again), so the problem is obviously at home In reality, at home we are often firefighting because school treat him as NT, and he can't cope with it. Now at school he is often refusing to work, cannot work alone, is angry as soon as he steps out of the school gate because of things that have happened during the school day, but yeah, he's fine at school 
The therapist showed such a lack of understanding of ASD, blamed us for parenting him as an ASD child, said we should be treating him as a normal child, when we've been there, done that, got the scars from the constant attacks. We cannot treat him like a normal child, if we do, we can't cope. And that's not because we're obstructive shit parents getting it wrong, it's because he has ASD/PDA. He has a neurological disability. It's because we are good parents responding to his needs whilst still working carefully to improve certain areas.
If any expert suggested that a child with a physical disability couldn't walk because his/her parents were pandering them and not treating them like an able child, there would be uproar! So why is this so acceptable when it comes to neuro conditions? ASD, ADHD and others seem to be so often considered parenting issues.
Our Ds has a diagnosis, a neurological disability which means he processes everything differently, yet they will not acknowledge it, they won't accept that we are bloody good parents who have improved our home life no end in the last few years, they won't accept that we know our DC well and treat them as individuals to help them each reach their potential, and I'm sorry, but their opinion of us being rigid and obstructive is bloody offensive, and from where I'm sitting, in our case (and many others I personally know of in my area with autistic children) it's CAMHS who are being rigid and obstructive, but we're all too scared of what they could do (reports to SS have happened with disastrous results). Threads like this are a godsend because we can actually be honest!
My son can be suicidal and will put things round his neck and tighten them. We were discharged with a letter saying this was normal for children with ASD. Really? Fucking really? 
I am not going to follow their suggestions because if I did, we would be accused of not keeping our DC safe (ds2 and his siblings) and they'd be right - we know what we have to do, but by doing it, CAMHS have us down as obstructive and not accepting their "support" 
So no, I will not sit and accept someone who doesn't know Ds telling me that I've got him wrong, and I now won't accept support that I know will make things worse.
Dh and I had to fill in some forms for Ds, they identified him as highly anxious.
Ds was asked to fill in the same forms for himself, he answered all the questions in a way that showed no anxiety present at all, partly because he was too anxious to answer honestly, plus demand avoidance kicked in and he made up all the answers!
CAMHS went with his answers only. Said he was fine, no anxiety at all.
The journey home after that appointment took three times as long as it should as I had to keep stopping in a safe place as it was dangerous to drive with him in meltdown.
He is upset that no-one understands him, but his condition and the way it presents means that he cannot open up to people, cannot be honest about how he feels. In these circumstances I will advocate for him, but when no-one will listen because of their own preconceived ideas with no basis in fact, what hope has the poor boy got?
Sorry, bit of an angry rant!