The difference between USA and the other countries with shorter election seasons is voting for a person to lead versus representatives who will elect their leader. Just look at off presidential elections to get an idea of a USA shortened election season. So, parliamentary governments have the citizens elect their equivalent of house and senate members; who then vote in their “president”. Good old US of A likes a cage match for the top spot, so you get the contestants parading around forever.
Between this and the huge profit motive the media has in riding this chaos train into the sunset for as long as possible, things definitely aren't gonna change.