No one is denying that the state of the jobs market in the UK is not good at present. But this is not the first time it has not been good. For the posters complaining that their children have been to hundreds of interviews and only got a minimum wage job at the end, however, a bit of reflection and honest assessment as to why that might be is worth considering.
Given "what happened 40 years ago" (not that long for me, thank you very much, more like 15-20) doesn't impress you, how about this. I was recently asked to talk to a friend's A-level age teenager about next steps as said teenager was contemplating a career in my field. This young person was seriously impressive: had a plan and a back up plan, had a list of questions for me that were well thought-out, pertinent and realistic, understood the effort that she would have to put in, and understood that she was on a path and she had to stay on it in order to get the best job she could. I have no doubt that young people like that, who understand their abilities, have researched the route they are going to take and approach it realistically, understanding the work involved, will be successful. This is irrespective of whether they are on a university, apprenticeship or other track. Everyone has skills and abilities they can maximise - they just have to be prepared and (crucially) understand what is involved in that. We are signally failing them in my view because they clearly do not.
Part of this as well, I am afraid, is that we have given children an unrealistic view of what they can achieve. There will always be people who have to do minimum wage jobs. There will always have to be people who do "menial" jobs (though I do not consider any job to be menial if you approach it in the right way, so right there I think is an example of the attitude that may pervade and be causing some of the issues - no work is beneath anyone). Given the number of children in "higher" education and "university" who might quite reasonably think that their efforts in education entitle them to something better, there are simply not enough "good" jobs. And this is where the preparation comes in. I have no doubt that any number of journalism or sociology courses would have taken my friend's child like a shot, but they knew that there was no point getting that sort of degree because there aren't the job opportunities to support it. Back in the day, I wanted to be a forensic pathologist, but I didn't do medicine because I knew, at the end of all the training there was a vanishingly small chance one of the few jobs in that field would be mine. It was too big a risk. So I did a non-vocational degree in a traditional academic subject, and then pivoted into a profession afterwards. My degree allowed me to do that because I went to a university renowned for its rigour, in a degree subject considered to be a "proper" subject.
We don't interview like they did when I was interviewing (my university and subject being enough to open a lot of doors) but I can tell you, even interviewing blind we can almost always tell which candidates have been through a rigorous academic training and which have not. The former are almost always from "traditional" universities.
I am sorry your child is struggling (I'm sorry, I don't recall you from any other threads) and all or none of this might apply to your child. But just as what someone did 40 years ago, and what I did 15 years ago aren't indicative of the whole, neither is your child's struggle. There is - in my view - an endemic problem with how we infantilise and medicalise our children. They are likely not going into the world of work prepared for what it entails. Where that is obvious, they will struggle to get jobs. Of course your child with additional difficulties will struggle more; but, and I say this gently, why do you think this would not have been the case 10, 20, 30 40 years ago? Employers want the minimum amount of hassle - unfortunately those with additional needs at least appear not to be that. But again, I'm dubious that that has changed. Yes, they should make reasonable adjustments, but are there reasonable adjustments that can be made for your son? It will depend on the job, but presumably he would be a big risk in any job where speaking to clients/customers is part of it? That will rule out a lot of jobs.