The problem is not the electoral college itself.

[mvymvy]

51. One person, One vote

Constitutionally, the number of electors in each state is equal to the number of members of Congress to which the state is entitled, while the 23rd Amendment grants the District of Columbia the same number of electors as the least populous state, currently three.

A constitutional amendment could be stopped by states with as little as 3% of the U.S. population.

Instead, pragmatically, the National Popular Vote bill is 61% of the way to guaranteeing the majority of Electoral College votes and the presidency to the candidate who receives the most popular votes in the country, by changing state winner-take-all laws (not mentioned in the U.S. Constitution, but later enacted by 48 states), without changing anything in the Constitution, using the built-in method that the Constitution provides for states to make changes.

All voters would be valued equally in presidential elections, no matter where they live.
Candidates, as in other elections, would allocate their time, money, polling, organizing, and ad buys roughly in proportion to the population

Every vote, everywhere, for every candidate, would be politically relevant and equal in every presidential election.