With this logic doesn't the US have proportional representation as well? Didn't Trump win the popular vote and republicans the senate? The majority of voters won, end of story, and the ones who lost have another chance in 3 years to flip the board. Where exactly is the missing vent valve you were talking about?
>think that a lot of the issues relate to free flows of capital across the world, which leads businesses to be set up in areas of cheap labour, which makes people in developed countries angry and more likely to vote for anyone who'll promise to fix it
Well yeah that's the big issue, but nobody will win the elections by saying they are slaves of the capital class and doesn't matter who you vote for as they are powerless to change the crooked financial system that actually runs the world even if they win the elections since the finance systems globally connected and easily moves to the areas with most stability and tax benefits even if they are undemocratic.