Bad audio quality with bluetooth on phones is mostly a myth. Todays smartphones only have cheap digital audio converters(DAC), so that you usually get higher quality music with a proper bluetooth codec like aptx.
Yes, BLE audio is an improvement but those devices are still in the future. What you have currently, you're better off using your smartphone DAC.
But their dongles' DACs are quite sufficient and are better than most of the audiophile DAC industry (which doesn't have the budget to actually make anything good).
https://www.audiosciencereview.com/forum/index.php?threads/r...
I do like bluetooth - but working out what features will work with which devices is a PITA. It always falls back to something functional, but fallback masks a lot of improvements that could be made. Although maybe that's the right approach. It works, and if you're somebody who likes to fiddle, you can.