Hi DjehutiAsar,
Thanks for your post in Microsoft Community.
I'm Mosken, I do apologize for the inconvenience that you're experiencing right now, let me help you sort things out.
According to your description, I knew that your Amazon FireStick connection failed, even if you tried reinstalling the driver. If my understanding is wrong, please correct me in the reply.
You can follow the steps below to try removing the device and then adding the device to resolve the issue.
"Win" logo key + "I" to open "Settings" > "Bluetooth and other devices" > "Devices" > ", then click to select your device name, delete, then try to re-add the connected device.
If the above solutions are invalid, we suggest you to seek after-sales service from the equipment manufacturer, who will give more targeted suggestions and help.
I wish the above will be helpful to you. Please feel free to let me know how it goes, and I will do my best to help you.
Best Regards,
Mosken - MSFT | Microsoft Community Support Specialist