Connecting PS4 controllers to PC

I use my 50" TV as my PC screen, which means my peripherals have to be wireless. I recently bought Pummel Party on Steam, and plays better on a controller. My PC doesn't have a Bluetooth card installed, so I went hunting for options. There is this: https://www.playstation.com/en-gb/explore/accessories/dualshock-4-usb-wireless-adaptor/ But what isn't common knowledge is most controllers - ones I have are PS4/XBox/Nintendo Switch - can connect to PC using Bluetooth! I went looking around in shops for the USB wireless adapter, and of course I couldn't find any. Then in a glass display at Qisahn, I find this: https://www.8bitdo.com/wireless-usb-adapter/ Great, it lets me connect all my wireless controllers wirelessly! Brought it home to try, but to my dismay Steam didn't automatically detect my controller as being a PS4 controller. Before upgrading the firmware, it recognized the controller as "Game controller", and after upgrading just became "Controller", but with none of the correct input maps! Not only that but I couldn't map the Analog Stick at all. After more research I got a simple $15 USB-Bluetooth Adapter. Spent a couple of days fumbling to get my controller connected to it. When I tried to connect a second controller, it just wouldn't "stay connected". I was on Windows 7 up until last week and the Bluetooth driver just wasn't working. I even got DS4Windows installed, but made no difference. Since Windows 7 support was ending 14th January, I thought heck now there's probably a legit reason to upgrade to Windows 10 - to get this Bluetooth driver working. I had to uninstall the Bluetooth driver (and unplug it) as well as my Avast Antivirus, otherwise the Windows 10 upgrade would just fail at the BIOS. After upgrade, everything works pretty seamlessly!