The US president being so important was always weird to me.

Until I learned that compared to my countries president, he has a bunch of actual official powers and gets to appoint the USs version of the ministers. Why the hell does one person have the power to veto laws and appoint the top executives of the laws that pass and issue vaguely defined executive orders that can seemingly overwrite any laws that still got through in a pinch. The only thing stopping the US president from just straight up overthrowing the legislature and ruling by decree is the fact that the Senators might get angry due to being out of a job and complain to the supreme court... one that the president nominates the members of.