I've had nothing but good luck with techs. Whether they be Dish, Comcast, or Sprint. When I had my 522 upgraded to a 722 several months ago the tech and I found that my other 322 wasn't working properly. He replaced it on the spot. No hassle, no "It's not on the workorder so I can't do it" excuse. Just good service. Comcast was just out to install new internet (and I'm trying their TV service as well - to compare to Dish). Excellent workmanship on the install. Two days later a Comcast supervisor came out to make sure things were working for me and to verify the installation workmanship.
My Sprint fixed wireless tech was good too. So good that I haven't seem him in forever. The initial install has lasted over 8 years with no problems.
I have no complaints about Dish or Comcast or Sprint techs. None. I can tell you from experience, that you do have to play CSR roulette with Dish. And also with Comcast. And also with Sprint. That's just the way it is. I don't think they're lying. They're just ignorant about their product (ignorant is not a derogatory term, it just means "they don't know").