Most democratic countries use the parliamentary system, where the party that wins elections creates the government through the prime minister. They are also the largest party in parliament.

Sure, the US does it differently, yet the parliament seems to often just not do anything and let courts legislate instead. Then you end up in this weird situation where the supreme court positions end up being extremely partisan to set the "correct" precedent.

Either way there's a lot of power in the executive in either system.