I couldn't agree more with this. Teams somehow managed to supercede my other microphone preferences when I'm not even using teams (took me a while to figure out). It might be one of the apps I detest the most. There is very little satisfaction with it and much annoyance.
Somehow, Teams overrides the volume controls on my Android phone. It's physically user-hostile.
By default, Teams never releases your audio input channel, even when you close it.