Bluetooth headphones sound bad on PC

Hey guys,

today my Bluetooth 6.0 adapter arrived and since I very much enjoyed the audio quality both when connected to my phone (Google Pixel 6A) and laptop (Windows 11, same as my PC), I was quite disappointed of the lousy sound after connecting to my computer.

I have tried a few simple steps like disabling the headphones' microphone & changing some audio settings, but now I'm honestly in a blank state of mind.

Any potential help is appreciated.