What is the "SNAFU" in My Teen Romantic Comedy SNAFU?
I suspect that whoever decided to use the "SNAFU" translation for the title was going for the original military acronym "Situation Normal, All Fucked Up", rather than the contemporary non-military meaning of "something that has gone wrong". 

Why? Well, the title in Japanese is "yahari... machigatteru", which means "...wrong, as one would expect". If that isn't a borderline literal (if less vulgar) equivalent of "Situation Normal, All Fucked Up", I don't know what is. 

(This is also, in my >opinion, a better translation choice than "...is wrong as expected", which is relatively unnatural and pretty obviously directly calqued from Japanese.)