I think what we are seeing here is the same thing that plagues all manufacturers these days: a severe shortage of talent available to hire. I have only dealt with S&W or any gun manufacturers' customer service people on a handful of occasions, and fortunately they have all been acceptable to good. But there are enough stories of the polar opposite to know that my experience isn't universal.
I work in the manufacturing field, and I can tell you that the biggest problem I see with the companies I do business with is that they have a very hard time finding good, competent people. People with pertinent manufacturing experience is especially hard to come by and getting more difficult over time for a variety of reasons. As we continue outsourcing product manufacturing overseas, we see an ever-shrinking workforce with any experience in making things or understanding of how things are made. So, manufacturers are having to train inexperienced people on the job who come in without technical knowledge, and that creates all sorts of mistakes, snafus, and QC blunders, because they don't understand the products the company they work for makes. We don't have the apprenticeship mentality that once was common in manufacturing and other "hands-on" technical jobs, and it's difficult to do so since the experienced people don't stay at the same employer very long anymore. The trade schools and other systems of learning are less common and fewer young people seem to want to get into professions that make goods. Instead, we depend on other countries with lower cost labor and less government regulation to supply much of the goods we buy. The result is one day you might talk to a knowledgeable, helpful, experienced person who understands you, and the next you may talk to someone who really doesn't even understand how the product works.