This is completely backwards. The most charitable interpretation is you're thinking the entire country would have proportional representation? You can still ha

This is completely backwards. The most charitable interpretation is you're thinking the entire country would have proportional representation? You can still have proportional representation on a state level. This allows minorities who might be 10% or less of the population to have some representation. Instead we have situations like North Carolina where the GOP won by 1-2% but has a supermajority or in 2018 in Wisconsin where the GOP got 38% of the vote yet got a supermajority. The other issue here, particular to the US, is that small states have disproportionate power. No one really predicted 200+ years ago that one state would have 40 million people and another 500,000 yet both have equivalent power in the Senate. So for the European Union, proportional representation would most sensibly be done on a country-level, not over the entire EU.