I posted a similar matter earlier regarding the competence of Malaysian air defences but it was deleted. Enjoy it while you can
But yes, I agree that this shambolic performance is designed to cover-up the total incompetence of the Malaysian Government team. I opined that neither a hijacked commercial airliner nor a subsonic military aircraft would likely have transponders active when entering peninsular Malaysia with "The twin towers" as the target. But the Malaysians would be able to confirm what happened after two days, then change their minds.
I now share the view that believing they were covering something else up was giving them too much credit.