There seems to be a bit of this going around at the moment so I think lots of people here will understand what you are going through. I send you strength!
It sounds like this has been a long standing issue from the things you said. Is the new school placement adding any extra stress, just because it is a change? Do you think there is a chance things will settle at all as he becomes more familiar with the new environment?
You are not a failure. You are trying hard but not seeing the progress your efforts deserve so feeling wrung out isn't unexpected. The school sounds good and experienced. Do they have any suggestions or plans in place that you think might help given a bit more time?
You sound like you are doing everything with external supports so I don't have any suggestions. Just wanted you to know we hear you.
