God Bless America is really a hamfisted movie where the director goes out of his way to show that American people are stupid and shallow as he tries to stitch it together with a threadbare script. this is not satire, it's a rant. the characters are not credible, the pace is all wrong, you can't sympathize with anyone and nothing is really believable. if the main character is so aggravated by idiotic TV and radio, why does he keep the fucking things on? you can spend an evening without a TV and you can drive without a radio.
anyway, social critique is one thing and good movies are another, they do not necessarily have to merge. in this case, they didn't.