I have to start by saying that some of the negative reviews are as funny as the show itself, if not only for the fact that they clearly miss the humor and unironically point to exactly the cringe-inducing moments of black comedy as examples of mean-spiritedness or unredeemable characters.
Duh. That's kind of the point.
Also, be wary of any review that is almost entirely predicated on one person's opinion that a particular actor is being misutilized - especially if it's obvious that this person holds that actor in inflated esteem. The acting, so far - only one episode in - is pretty spot on.
Danny McBride has a gift for depicting totally unrelatable, yet not entirely unsympathetic misanthrope. He delivers extremely inappropriate dialog without cracking the thin veneer of believability. Walton Goggins, in his characteristic Alabama accent, plays foil to McBride as a character who the viewer can believe actually likes his fellow human beings. Both of them are, in their own ways, shameless self-promoters and viciously ambitious career climbers who totally overlook the fact that they've abandoned their moral compass in pursuit of a less than lofty goal.
The only weakness I can really point to is the family scenarios and the relatively unbelievable ex-wife's new husband - a character in his mid to late 40s who dresses and acts like a one-dimensional talking Hot Topic mannequin.
I'm interested in where they take the next several episodes and I'd recommend checking it out if you like dark humor or any of the actors involved.