I don't think they're angry,
No anger, people just need to know that if they ask they will be turned down. Quite a lot of keys have gone out at this point to people with computers and hardware ranging from very weak to very high end so no more testers are needed currently.
I can think of one instance of hardware that would be very helpful. If someone had the Razer OSVR HMD or some other experimental VR stuff like Oculus Touch, though a couple testers have touch controllers.