Solving Issues in Google Meet
Try the steps on this page if your your audio/video quality is poor during a Google Meet.
If your camera and/or microphone are competely not working, try this page instead.
Poor A/V Quality In Google Meet?
Poor A/V Quality In Google Meet?
You might need to lower the settings for hotspots or slower internet connections...
If it is really bad, as a last resort, it is recommended to just turn off your camera and use only microphone.
Other Resources: