You certainly have many options, even if at least you could assign representatives proportionally per state or using D'Hont you would be getting a significant improvement.
It's nearly impossible for anything like that happen even at the state level, let alone federal elections, which would basically require an amendment to the constitution. The party that stands to lose from it (Republicans in this case but I doubt it would be much different if the roles were reversed) has enough power to block any such changes.