There were certain rogue-like behaviors during Taiwan's authoritarian era. For instance, the ROC used to
award and decorate plane hijackers from Mainland China, who hijacked not military planes but civilian airliners. The
initial incident in 1983, when the perpetrators were awarded with as much as 1000 taels of gold per person, incentivized a wave of "freedom-loving" Mainlanders to hijack civilian planes and fly them to Taiwan. One of such
hijacking incident resulted in a plane crash that killed 128 innocent people, including 30 Taiwanese tourists.
The ROC military was also responsible for incidents such as
massacring 20 Vietnamese refugees in 1987, including pregnant women and babies, and
suffocating 25 Mainland Chinese fisherman in 1990.
These might not have been extraordinary for states in that region during that era, but certainly counts as rogue behavior, on par with "typical" rogue states such as Libya and North Korea.
Fortunately, such policies gradually stopped after democratization in Taiwan. A delayed democratization would certainly prolong them.
As for the shitty living standard part, with such a late PoD, it wasn't easy to derail a developmental state which has completed its take-off stage. Probably severe internal turmoil and/or irrational investments in high-tech weapons' programs would do.