[oneplane]

It's not really all bluetooth what you're describing there. Almost all of it is implementation-specific: many vendors do a sad job at implementing bluetooth, or if they buy a module as-is, they do a bad job at integrating that module.

[moron4hire]

Maybe it's still Bluetooth SIG's fault for not making a spec that is easier to adhere to.

[oneplane]

Even if the SIG would pay implementors to do it right, it would be done wrong. Some vendors just don't care. Same goes for USB3 cables for example. It's not that hard to do it right, but many just don't care or don't want to.