I understand your frustration. Oftentimes here people will pick up on a tangent of something you say and run with it. It’s annoying.
I also hate badly done accents, especially Southern ones, in movies.
However, due to your post I went to see/listen to the movie trailer and I have to say I don’t hear the same fakeness you do. Granted, the dialog is not long. Maybe I would detect it in the whole movie ... but from the trailer I did not detect the fakeness.
I have a pretty good ear for accents, especially Southern accents. Based on this short trailer I would say if the actor is not native to the region he is pretending to be from, he did a very good job of getting the accent down right. Whether he can hold it steady for the whole movie I’ll have to wait to see the whole thing. Oftentimes, even if actors do a good job with the accent, you’ll hear little slips here and there. That’s doesn’t bother me as much as the whole thing being done poorly.
I don’t understand the controversy over the accent. I haven’t seen the movie yet, but based on the trailers, I was surprised at how good the guy’s accent is. He sounds like some of my neighbors.