There really should be a Bluetooth setting for “do not auto connect me.” My car does this too, I wear bluetooth headphones a lot and for short to medium car trips it’s not worth it to have to connect and put my headphones back only to pull them back out and reconnect after I arrive, I’d rather just listen to headphones the whole time, but my car waits until I’ve turned on the car and pulled out of the driveway to auto connect against my wishes.