So the aircraft turned West, then North, Then West again, and finally South/South West towards the South IO. This would appear to eliminate ALL possibility that the aircraft was flying out of control as a result of a technical problem, after the ACARS and SSB had been "Lost".
there were so many false rumours on the flight track and so many speculative theories what happened that such news do not have much weight now. let them find the wreckage and we will see someday what and why happened - today no person in the world can say .