You mean Hitler didn’t win with a majority. He did indeed win as do most leaders in a multi-party parliamentary state, with a plurality.
Hitler was never elected to anything.
He finished second in the 1932 German Presidential election, forcing a runoff with Paul von Hindenburg, which he also lost. He was then appointed Chancellor by von Hindenburg on 30 January 1933.
The only election Hitler ever won was his 1934 plebiscite over his assumption of state power, and even then he was not standing personally for election.
One benefit of our “cumbersome” American system of government. The two party system, bicameral houses, Electoral College are all blessings to prevent tyranny or tyrants getting power.
That’s why we need to undo the imperial Presidency. It extends well beyong the man, to the entire Executive Branch.