I'm not talking about anything HD, basic mouse keyboard via BT and simple SBC for the headset. Never had any issues with that combination on Windows in the past

I'm not talking about anything HD, basic mouse keyboard via BT and simple SBC for the headset. Never had any issues with that combination on Windows in the past before jumping on to Mac 6+ years ago. To add insult on top, I still remember many people telling me to "just do" a full system reinstall to see if it solves the issue.