It's not 50% though; in 2020, only ~240 million people were eligible to vote (out of 330 million, so about 72% of people); only ~158 million people actualy voted (48%). Oversimplifying, only 25% of the population of the US voted for Trump, and it's probably even less due to the system of electors.
This is why democracy is broken, because not everyone gets a voice.
This is why democracy is broken, because not everyone gets a voice.