I agree. I've always loved the show, but this past year or two, I find I haven't been enjoying it very much. It seems the characters of Marie, Frank, and Ray have become very mean-spirited, cartoonish and one-dimensional, they use the same tired storylines over and over again, and the show itself just doesn't seem too likeable and funny anymore. Robert, Amy, and sometimes Debra are the only characters worth watching now, IMHO.
My favorite moment from tonight's episode: Robert sees Debra in the cell and says, "She finally did it. She killed Ma!"