Would the US be better off with a multi-party system?

[Chief Justice Keef]

I heard from a lot of people this election that they were disappointed with not only the candidates, but the direction a lot of the parties took (the Democrats moved towards identity politics/social liberalism with Hillary's campaign, and the Republicans moved towards anti-establishment rhetoric with Trump's campaign). Many younger Americans, especially Bernie voters, feel like both parties don't represent their interest.

My question is, would the United States be better off if there were several major political parties on both the left and right rather the the two big Democratic and Republican institutions? If this meant changing our voting system to something like mixed-member proportional or single transferable vote,  would more people want to vote?