I am very much hoping mine won't 'drop out'! He's very much looking to me for guidance about 6th form as he knows I take his future very seriously (I'm not suggesting you don't!!) as, being a grown up, I can see rather further than he can! And, if he made an realistic, educated, informed and properly researched 'choice' to go to a certain college, that he could 'sell' to me, I'd be delighted at his motivation and initiative!
As it is, my job is to guide him as best I can (I know the parents of DC at both colleges and many of their DC personally, DS doesn't!) and, let's face it, know I did everything I could for him.
Interestingly, the 'it's their lives, butt out' argument is never cited when it comes to selecting a small, nurturing, tightly controlled private secondary school for a DC who'd drown in a state comp, is it? To ensure that DC gets the grades necessary for The Next Stage? That's seen as being the thing any responsible parent should do; whereas guiding a 15 year old to the right and best 6th form college they can aspire to is seen as interfering! It'd be a lot less of an issue is the DC was by virtue of a carefully managed set of GCSEs, naturally heading for The Best 6th form, wouldn't it?! Maybe if I'd sent DS1 private, where he'd have been far more tightly supervised than his huge state comp can manage, he wouldn't be, at 15, still struggling with deadline meeting and time management? And a 'dead cert' for PSC?!
For the record, I have no issue with plastering apprenticeships! Ideal for the right candidate! Interestingly, at 11 I imagined DS2 would be heading in that direction but he is doing rather better academically than I though he would and, at 13, is showing no adolescent rebellion, yet!
As for the predicted grades, they're my predictions for him, not the school's. They were airily predicting As across the board til early last summer! But I know DS better than that, and have seen that he's faltering, now, thus maybe isn't what I now perceive 'PS material' to be. I did O levels 35 years ago when what I stated would have been considered a very good, solid result, certainly uni-worthy! It's interesting that your DS did so much better than this, yet obviously hasn't been able to capitalise on them. Of course, I wouldn't dream of asking you to spell it out on here, but - what went 'wrong'? Can you see how I might, for lack of knowledge of your situation- suggest, 'wrong choice of 6th form'? Which I'm trying to avoid!