> Most Americans are perfectly okay with this because there hasn't been any serious effort at an Amendment to grant each citizen with similar amounts of power in the Senate.
This doesn't follow. There is no way to amend the Constitution by a national popular vote so the opinion of the majority of Americans is irrelevant to the question of any Amendment's passage.
A more likely reason such an Amendment wouldn't exist is that a majority of states favor the status quo, because most states are small and benefit from their current outsized representation in government.
One of the mechanisms for beginning the amending of the USA constitution is via a 2/3 vote of both houses of Congress. The USA House of Representatives assigns political power approximately proportionally to population and it has never passed any proposed amendment to proportionally elect Senators or delegates of the Electoral College.
Source: Article V
Edit: Corrected 3/4 -> 2/3
Edit2: I stand corrected. The Bayh-Celler proposal was passed by the House and filibustered in the Senate in 1970.
This doesn't follow. There is no way to amend the Constitution by a national popular vote so the opinion of the majority of Americans is irrelevant to the question of any Amendment's passage.
A more likely reason such an Amendment wouldn't exist is that a majority of states favor the status quo, because most states are small and benefit from their current outsized representation in government.