hi starlight - I definitely think you seem to have encountered the type of teacher I described in the second half of my (loooong) post. No wonder you are fed up - I would be too.
"To improve social skills" - no, not SMART. The given breakdown only relates to the group, not to what he needed to do in order to meet the criteria.
The arguments over hours - madness. 1:1 means just that. And yes, the teachers in question should have been talking to the head if they disagreed with the statement, not arguing with you.
I should add, stories like these honestly really embarrass me. I have been lucky enough to teach in some really supportive schools, and the teachers have been fantastic - so it's quite gutting professionally to hear these stories, and also makes me both sad and angry knowing what children and parents sometimes have to go through.
I've read the SENCOP! But admittedly, I read it because I was interested, not because anyone ever advised me to. In my last school (an independent) we had a great SENCO who not only oversaw SEND and supported/advised all of us very ably but also taught groups herself. We also welcomed Ed Psych reports and in fact often suggested them as we found them so useful in terms of how best to support children. In the state schools I have also been in, not the same set-up - typically the SENCO is only even there a couple of days a week, and pretty much just "oversees". Oh and everyone seems to be terrified of Ed Psychs?! When I first started teaching, I had a quadriplegic girl in my class who sadly also had brain damage. I went to the SENCO and asked how best to support her and she basically shrugged at me. So I'd had minimal experience, minimal training (maybe one day of my PGCE??), and no clue at the time over what to do or where to get help. (Luckily she had a fab 1:1 TA so it did work out ok.)
So yep, I know all too well that SEND provision varies massively. It shouldn't, but training and support within schools similarly varies, so getting a teacher who knows what it's all about is a bit hit and miss depending on their own experience. I personally feel more (and standardised) training would help - both in this area, and more generally also in communication with parents. I learned it on the job, but then again before I was a teacher I also worked in commerce, so I was far more experienced in adult communication. Most teachers go from uni straight into teaching, so all they know is academia and working with children, NOT adults. Very very different.
There are various other issues which I think also make it all worse, but then I'd be banging on forever on my little soapbox, so I will shut up now! Fingers crossed for all of you that you will hit upon the lovely teachers who are out there, and that they will be able to help you and your children!