How to stop bluetooth from activating every time Mac wakes up?
It's probably because it's been paired with the mac. Unpair the device.


  Remove a Bluetooth device from your Mac
  If you want to remove (unpair) a Bluetooth device from your Mac's device list, follow these steps:
  Choose Apple menu > System Preferences, then click Bluetooth.
  Hover the pointer over the device you want to remove, then click the button Cancel button that appears next to the device's name.


After you remove a Bluetooth device, you'll have to repeat the pairing process if you want to use it again.