Many, many years ago I was a language student - two languages at that! I graduated worse in one language than when I started and a level of fluency in the other that I'd have expected by A Level. I never heard of these A1-C2 standards at the time (the modules I took are now named with those letters to give you a better idea where you're up to) but I doubt I was even B2 in my better language by the time I graduated and that was after 11 years of studying it (it may be that I was a bad student who didn't work hard enough. Or it may be that language degrees spend too much time on literature and culture and not enough time on learning the language.)