Why Japan's Type 96 anti-aircraft gun underperformed

Was the Japanese 25 mm Type 96 poor because of doctrine or the mounting itself?

It appears to have been an over-complex, maintenance-sensitive weapon whose practical accuracy and reliability were poor.

A stereotype of poor Japanese production quality does not explain the Type 96's failures. The mechanism pursued an impressive technical solution on paper but suffered from jamming and poor practical accuracy. Complexity raised maintenance demands in a salt-water environment where simpler weapons could remain available more reliably. An anti-aircraft battery may gain more from numerous dependable guns than from a nominally superior mechanism that is difficult to keep working.