There are many different types and implementations of representative democracy. And the supranational technocracy-driven particracy of the EU is only representative in name. It is on the oligarchic end of the democracy-oligarchy spectrum.

Representative in what way? 700 MEPs for about 450M people means each one has 640k "constituents". Those "constituents" are really a fraction each person all smeared about. Lastly if they were actual people and an MEP were to hold a consultation to get their views it gives each person less than 1 minute each year assuming the MEP was available 24/7/365.

Well if they're modeling if after what we have in the US they pretty much nailed it. 435 representatives for 330M people or around 758k constituents per rep.