I think there is crappy hardware and crappy software. But there are also good combinations. In my case, my Sony and Shure headphones have always worked perfect

I think there is crappy hardware and crappy software. But there are also good combinations. In my case, my Sony and Shure headphones have always worked perfectly on my 2013 MBP, iPhone 7 and multiple Linux boxen. Don't know what controller was in the MBP and iPhone, but all the PCs have Intel ones. I now have a mouse which works surprisingly well over BT, although I usually use its own dongle because it seems to have less lag and it can switch between the several computers connected to my KVM at the same time the display and keyboard do. However, on Windows, things aren't as smooth, even though it's strictly the same hardware. Connections take longer to establish, and the mouse has definitely more lag than under Linux. It also doesn't support the very high bitrate audio modes both my headphones and Linux support, and if I'm watching videos the audio is out of sync. Since I rarely use Windows, all in all, I'm a very happy Bluetooth user.