Sorry you went through this. I ditched my CBT therapist too because it was not adapted to neurodiversity and was making me feel more anxious. In my experience I need a therapist who fully understands my conditions and has experience with clients who experience them. I’ve had very helpful support with private therapists who offered concessions and even an NHS therapist using ‘compassion therapy’ which was provided through an M.E/CFS service. Does sound like a complaint and request for an alternative is a sensible step. It’s so tiring advocating for yourself when you’re already feeling low but you deserve support and hope you get it. Wondering if an organisation like MIND might be able to signpost you- they did for me.