I wouldn't blame the phone too quickly, although the quality of Bluetooth implementation does vary. More likely, you are not happy with it because a Bluetooth signal uses compression. This becomes worse if you are transmitting a compressed file such as .MP3 or .WMA, as compressing an already compressed audio file leads to more audible artifacts. In addition, because it is radio, and very low power radio at that, it is subject to interference from other devices in the 2.4 GHz band like your wireless phones, microwave ovens, etc.
There is even a relatively new source of potential interference: USB 3.0.


BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.