I feel a bit upset reading this thread as a current undergraduate.
For the record, I go to an ex-poly, and I'm not studying a traditional degree, so maybe the university feels it has to go to an extra effort to make us employable. We do get advice on how to apply for roles and are encouraged to get work experience in the summer holidays and/or take a placement year to make ourselves more employable.
Our essays also do get marked down for poor spelling and grammar, as well as not using appropriate scientific language and not using a formal enough writing style. I don't think- unless the assignment is completely incoherent, or there are major issues- it is fair to fail a student just for having poor grammar, especially in exams where our lecturers are aware we will have been writing for 2-3 hours straight. Lecturers often mention specific issues in general feedback, including any grammar issues that came up regularly.
I think, from talking to my recently graduated friends, the main problem is the volume of jobs graduates are applying for these days. This may not be the right way to go about things, but when you are 100 or more applications in, it must get harder to have the enthusiasm to individually tailor each letter.
Also, I would say we are the product of an education system that did not teach grammar formally as such. Certainly by secondary school, I can't remember having much formal grammar teaching at all. Most of my understanding of grammar actually comes from learning French, and therefore is not directly applicable to English in some cases. At primary school I was obviously taught how to use punctuation but some of this (such as how to use a comma) I found out was later partially incorrect.
I was also very lucky to have some excellent teachers at A level who helped me learn "how to write an essay" and "how to write a scientific paper", but I do think it is possible to get to uni (if you didn't take any essay based A levels) without being formally taught how to write an essay properly. I do think the education system is possibly (probably) going wrong somewhere.
I'm not saying I've never met lazy, entitled graduates/undergraduates who think the world owes them a living- even though they've never had a propper job before. Some of them have been unemployed for months after graduating. However, the hard-working and commited ones got jobs quickly and are doing well for themselves- so they must be doing something right?