In normal democracies you have multiple parties, so there is a much better chance of creating a coalition around the government and force election/impeachment if the leadership goes rouge. The US system turned out to be as fragile as it looks.

The failure of the US is not so much in judicial system (with some recent exceptions) mostly in how weak Congress has been for over a decade as executive power expands (arguably since Bush and including during Obama). The system was designed to prevent that from happening from the very beginning with various layers of checks on power, but the public keeps wanting a president to blame and fix everything. The judicial branch has been much more consistent on this matter with some recent exceptions with the Unitary executive theory becoming more popular in the courts.

Ultimately no system can't stop that if there is a societal culture that tolerates the drumbeat of authoritarianism and centralization of power.