I think the OP is wondering if the text shows skepticism with the modern way of living (sales, business, desk jobs, boss, public transit) versus a more old-fashioned life (farming, working the land, answering to no man). Gregor is under a great deal of stress, not only from his job (a vocation that never existed in the past) but from his family, who expect him to support them (in the past, everyone would contribute to a family's well-being). Because of the modern conventions, Gregor is solely responsible for far too much; his mind is set for an older convention and he is feeling the pressure of modern life.
"Travelling day in and day out. Doing business like this takes much more effort than doing your own business at home, and on top of that there's the curse of travelling, worries about making train connections, bad and irregular food, contact with different people all the time so that you can never get to know anyone or become friendly with them."
(Kafka, The Metamorphosis, gutenberg.org)
This is, of course, only one possible answer to the question, but I think it's a valid point; if Gregor was working from home, as he mentions, he might be more calm and collected, instead of being highly-strung and on the verge of a nervous breakdown. In fact, the story itself might be read as an allegory for a nervous breakdown, with each part of the transformation equaling a part of Gregor losing his mind. I also think that his breakdown may well be a function of his ill-suitedness to living and working in the modern world; he seems almost more content to live as a bug than to take the train to work every day.