I haven't seen a lot of acting that i'd call atrocious on that show. Most of the moments where I begin to think that the acting is really bad, I can just as easily decide that it's because of the lines they're speaking and blame it on the script. This is really evident in a lot of the "oh hell no!" type moments when people are sad, and the over the top pretty string type sounds start playing and all that stuff, combined with the crying they have to do. Crying is always weird to watch actors do.