“looks like part of the tail is missing.“
That’s a very likely cause of rapid descent!
I am more inclined to agree with that point you made than not.
These aircraft are not designed to be outside the flight envelope in that attitude. If I heard an engineer say that the tail was ripped off in the gyrations the plane suffered, I wouldn’t blink an eye.
We all know a 707 did a roll once by a test pilot, and that a 727 was inverted in flight during a storm, but...those were different planes, different construction, and different times, IMO.
You might convince me to go inverted in a well built 727 flown by someone who knew what he was doing, but a 737 in any instance being inverted...ummm, no. Not me, baby.
We shall see.
“looks like part of the tail is missing.“
That’s a very likely cause of rapid descent!
I don’t think a plane missing a tail would dive like that. It would be rolling or yawing at least some.
An aircraft losing its tail is much more likely to go into a stall and/or flat spin.
This appears to be a controlled flight into the ground.