Singapore is a strange outlier among successful democratic countries. There's always stories that are untold. For example, https://en.wikipedia.org/wiki/Lim_Chin_Siong?wprov=sfla1 Operation Spectrum untracing the conspiracy' https://share.google/2mRpZk3RGaYUKCRXS
There are severe restrictions on speech, assembly, press and important legal and political barriers for the opposition parties. It is very easy to land in front of a tribunal for defamation or similar for expressing dissent or accusing the government of corruption.
The truth is that Singapore has been lucky that Lee Kuan Yew and most of his successors have been good bureaucrats and politicians. That makes the ruling party also somewhat popular.
Lee Kuan Yew has been an astonishing nation builder and an extremely brilliant man with a huge sensibility for politics and understanding the world.
But it's still a system that's waiting for the wrong people to be put in charge and test the limits of their "democracy".