Hmm. I agree with some of this- the autotune is annoying, certainly. But it seems a little disingenuous to review a comedy and ignore the jokes, which are plentiful (and New Directions is one, of course, imho all the better for not being spelled out). And I think that the use of the standard stock characters is fun and knowing and exhibits precisely the kind of irony you say is lacking.

It made me laugh, anyway, and that's usually enough to keep me watching a thing.