I agree. Khadas focus a lot on selling new products, but they completely fail to give proper support to them. There is a long discussion about VIM2 underperforming since several months ago, and they pay absolutely no attention to it. All the requests for an answer from the community have been ignored. I am very disappointed with Khadas, and by no means will buy the Vim Edge.
References:
https://forum.khadas.com/t/s912-limited-to-1200-mhz-with-multithreaded-loads
https://forum.khadas.com/t/cpu-frequency-up-to-2ghz