What should I do if I have a negative experience with Thai immigration officers at the airport?

At Suvarnabhumi Airport immigration, the female officer handled my passport roughly. She told me to wait and then placed it on the scanner. Because I have a DTV visa, I needed to present both my old and new passports together. However, she threw the passports onto the counter, which felt very rude and unprofessional.

She also wrote the visa expiry date by hand in a way that was difficult for foreigners to read. At first, I thought my passport did not have an expiry date indicated. I had to ask another officer for clarification, and only then did I learn that the handwritten note was actually the visa expiry date. I even had to go back and ask the same officer again to confirm it. Her behavior throughout the process was extremely rude and unprofessional.