I agree this is an unfortunate situation.
There is a part of me that wants to stand on the "buyer beware" side of the fence. I mean, he attended the full course of study and appears to be raising the complaint now that he's graduated. If he had a problem with the course content he could have looked for another college as soon as he saw the course calendar or set of syllabuses (syllabi?) for his first semester. The problem is that assumes that he should know what he should be learning to become educated in his field. Students don't always know this - that's why they're students.
The other issue is one of hiring. Education is only a single factor that plays a role in getting a job, and it is never a guarantee of one. Without knowing anything else about the person in question, we can't know that Best Buy rejected him specifically because of his education. It could be that they had 100 applicants for 2 positions, some of whom had more experience. It could be that he has pictures of himself "partying hard" on his Facebook page, or that his resume has spelling errors on it.
With all of that said though, I have to look at the other side. Did the institution in question provide a fair and reasonable service or did they take advantage of ignorant students?
Students have a right to demand a high degree of quality from their educators. Particularly in community colleges where the education is specifically oriented towards entering into a specifc field of employment they have a right to up-to-date material.
Buyer beware has a limit when the buyers can't be aware until after they have bought.
I hope things turn around for the guy.