Again BS: You can have it within 7 working days when you hand over all the documents in 1 go. You and I both had the DTV within 2 weeks. That isn't "a long time".
Nonsense. When in Cambodia you can apply via the Thai e-visa website. When you give them all the requested documents you will have the DTV within a week. I missed the employment letter and still had it within 10 days