"Thank you for your thoughts on this matter, I didn't read them. Here is a boilerplate statement espousing all the great things about this bill that you specifically criticized in your message to me. Please don't reach out again."
An intern read it, after which they found the form letter written by the staffer who handles those issues and used that to reply to you. The communication will never reach the staffer, let alone the congressperson. If you’re lucky, the office won’t have an intern and the administrative assistant will be the one to do the above.