When the tsunami hit and Fukushima #1 lost power and was at risk of meltdown, TEPCO was ready to scuttle the reactors by dumping seawater in them. It would have rendered the reactors unusable, but meltdown would be prevented.
The Japanese government at the time, coming from the Prime Minister (Naoto Kan) himself, denied TEPCO from scuttling them because the government wanted the reactors usable. TEPCO was begging for authorization but it was not meant to be.
So what happened was the meltdown happened and the reactors became unusable anyway.
The blame was then scapegoated on TEPCO, because elite politicians surely can't and shouldn't be prosecuted for their ineptitude.
What happened at Fukushima #1 was a human failure that did not have to happen.
Bittersweet revenge was that the incumbent party at that time, the Democrat Party of Japan, lost the subsequent general election and the party subsequently fell apart.