Try breathing like Malcolm’s friend Stevie.
That’s letting the air out in a completely relaxed way. Yeah the diaphragm is asleep at the wheel, but only for the exhale, but that’s not the point. Sing like that. It’s almost like verbal diarrhea. Then try to control the air from falling out without adding any tension to the neck, tongue, or lips. It is helping me disconnect the breath from the throat.
It’s a different perspective on breathing.