If you had heard stories from Grandparents about the
ABSOLUTELY SHITTY RULE of the KMT, you, sir, might beg to differ.
Corruption galore, stripping
TAIWANESE industry down to the bone, then scurrying back here like rats to their nest. THEN the White Terror.
As far as I am concerned, the KMT are worse than garbage
Chiang Kai-shek was bullshit,
but once the Communists occupied the Chinese mainland, things began to change gradually. After "February 28th", a lot of leading intellectuals in the Japanese colonial era were killed, and a generation of elites was killed off by the KMT; the crime was arguably 10 times more terrible than Tiananmen.
However, to be fair, I would say, Kwoh-ting Li of the KMT should also be viewed positively regarding Taiwan's economic miracle. And ironically, it was Chiang Ching-kuo who began the process of localization. The White Terror should never be forgiven, but we should not be that objective to say that the Taiwanese have nothing to gain from KMT leaders, especially after the 1960s. While I despise Chinese Communists, I would never say they are "worse than garbage" or has no contribution to the Chinese people. Deng Xiaoping was a decent leader that saved China from the Cultural Revolution, though I have strong reservations about one-party rule and the lack of civil liberties.
You could criticize Chiang Kai-shek and his family, or early leaders responsible for February 28th or the destruction of industry, say Chen Yi. You could blame Chiang Ching-kuo for the death of Henry Liu and the Kaohsiung Incident. I can understand your hatred towards the KMT, but let's be objective. I have a friend in Nantou, a fairly pan-blue area, who have relatives killed after 2.28.
He's fairly pan-green due to such a background, but he told me that Koo Kwang-ming's "revenge plan" to ban the KMT through a new martial law was "disturbing and unhealthy to Taiwan's young democracy". It's really lucky that Tsai becomes the DPP leader instead of Koo

He is not just unelectable, but with absolutely no respect for democracy and the importance of reconciliation. Let us not be another Viktor Orbán or Koo Kwang-ming.