This is why Japan prefers to fire refurbished WWII dreadnoughts into orbit
The sequence of events before the break-up, as far as the analysis can determine, started with a problem in the attitude control system
It always starts with a failure of the attitude control system - the one of the organization.
It is likely that someone pushed the development team too hard, or not enough money, time, manpower or skill were available, or procedures were generally inadequate and haphazard, or communication channels broke down and proper work was replaced by top-down PHB wish fulfillment activity.
A bit like what regularly transpires from other Japanese industrial sectors, like the nuclear one.