There is a lot of information available from the flight path graphic.
The accident appears to have developed as a loss of airspeed awareness leading to a fully developed stall and roll off departure to the port side with post stall gyrations. The nose then became planted way nose down, left wing down as the stall broke, but they never recovered from the nose down-wing down attitude.
When you plant the nose as deeply as it was in this case, you have the effect of the almost the entire aircraft weight in force acting to accelerate the aircraft (sort of like going into afterburner on steroids). It is virtually impossible to maintain a stall.
For some reason, the crew was unable to level the wings and recover to level flight. Without the CVR, unless they find some physical evidence of damage to the airframe preventing leveling of the wings, the crew will be blamed both for the departure and the failure to recover.
Using known aircraft performance data, the specific reasons for the deceleration into the stall should be understood (eg the West Caribbean Airways Flight 708 scenario).