You're correct that the senate was designed not to represent people and give the number of states more power. To say that isn't an issue though is pretty fucked up. It was literally done this way to get slave states to sign on, giving them power to protect the institution of slavery.

States are made up. People are not. Only one of these should have power in a democracy. States can have their own laws that effect themselves, but federal policy should be dictated by the will of the people, not the will of arbitrarily drawn borders.