How to defeat NHK?

You cannot. NHK only assaults entities within the initial stratum of reality.
It's existing in a totally different reality, not even on the same plane as us.
And that means it can just mess with everything, anything, you name it.
It's like this cosmic puppeteer pulling strings from beyond.
if you somehow manage to hop into one of these dimensions, NHK might ease up on the unfortunate.
The more you dive into these twisted layers, the less it wants to mess with you. You're getting too close to its own weird existence.
Because NHK its some kind of holy unity, it starts seeing you as part of the grand cosmic dance as well.
You could do that or bring another unity/being from a different plane of existence to help you overcome NHK for once n for all.