I am as tired of AI slop as everyone else but I think the backlash to this is way too exaggerated. Commercials are already "slop." There is no expectation of quality at all. The average Christmas commercial involves a bunch of elves singing "Taking Care of Business" while dancing in front of office supplies.
This commercial sucked because nobody wants to hear "it's the most terrible time of year." I don't really care if they used AI.