OK, I finally solved this problem which has already bothered me for half a year.
I tried almost everything in this thread:
closed Steam, not working;
reinstall driver, not working;
I don't have NVIDIA experience;
etc...
until, I disabled the internal bluetooth receiver (which in integrated with my motherboard) , and enabled the bluetooth receiver dongle which I bought from Amazon - windows only allow you to use one bluetooth at the same time, you can enable/disable them
in device manager.
now, my controller is working, perfectly. I don't need to restart anything.
Hope this could help other people.