Every state has 2 Senators.
The Senate represents the States. The house is supposed to represent the people, but does it? They represent their own political ideology, and couldn’t care less about the people they’re supposed to represent. Nancy P proved that when she called another rep “insignificant”.
To add to that, the STATE legislature started out picking them. This guaranteed that they would be beholding to the state and not the popularism of the time.
The House is for the People.