The election system distorts the vote quite dramatically in the US, that’s true.

However, depending on where you’re from left has quite a different meaning from what Americans mean when they say left. E.g. the Democrats don’t want to dismantle capitalism or expropriate real estate companies (the city of Berlin seriously looked into this option). Center left has a similar shift in meaning in other countries.

Those that think they are on the left is larger. When they support politicians viewed around the world as right wing, they too are right wing