It really sounds like Windows or Valorant is redirecting audio incorrectly, possibly due to chat/game mix settings or conflicts between Windows, MSI drivers, and your Bluetooth headset profiles.
Disable Hands-Free Mode (Bluetooth Issue)
1: Go to Sound Settings (Win + I > System> Sound).
2: Scroll down to Advanced sound options > App volume and device preferences.
3: Locate Valorant and see what output it's using.
4: If your headset is listed twice (one as "Stereo" and one as "Hands-Free"), make sure it’s using the Stereo version, NOT "Hands-Free."
5: Go to Control Panel > Sound> Recording tab.
6: Right-click the Hands-Free headset > Disable it (this prevents Windows from forcing chat mode).
Manually Set Bluetooth Codec & Profile
1: Right-click the Sound icon > Sound settings.
2: Click "More sound settings".
3: Select your Bluetooth headset > Click Properties.
4: Go to the "Advanced" tab and change format to 24-bit, 48000 Hz.
5: Disable exclusive mode (uncheck both boxes).
6: Test in Valorant.